This Giant Map Shows All the Metropolitan Areas in the U.S.
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This Giant Map Shows All the Metropolitan Areas in the U.S.

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This Giant Map Shows All the Metropolitan Areas in the U.S.

The United States is the third most populous country in the world, made up of close to 20,000 cities and towns, and 333 million individuals.

Dividing these population clusters into a coherent framework of statistical areas is no small feat, and the U.S. Census Bureau’s latest map shows just how complex of a task it is.

This enormous map—which covers the entire country, including Puerto Rico—includes 392 metropolitan statistical areas and 547 micropolitan statistical areas.

For reference, here are all the current metropolitan statistical areas in the United States, organized by population:

RankMetropolitan statistical areaPopulation (2020)Change since 2010
1New York-Newark-Jersey City, NY-NJ-PA MSA20,140,4706.58%
2Los Angeles-Long Beach-Anaheim, CA MSA13,200,9982.90%
3Chicago-Naperville-Elgin, IL-IN-WI MSA9,618,5021.66%
4Dallas-Fort Worth-Arlington, TX MSA7,637,38719.96%
5Houston-The Woodlands-Sugar Land, TX MSA7,122,24020.30%
6Washington-Arlington-Alexandria, DC-VA-MD-WV MSA6,385,16213.02%
7Philadelphia-Camden-Wilmington, PA-NJ-DE-MD MSA6,245,0514.69%
8Miami-Fort Lauderdale-West Palm Beach, FL MSA6,138,33310.31%
9Atlanta-Sandy Springs-Alpharetta, GA MSA6,089,81515.19%
10Boston-Cambridge-Newton, MA-NH MSA4,941,6328.55%
11Phoenix-Mesa-Chandler, AZ MSA4,845,83215.57%
12San Francisco-Oakland-Berkeley, CA MSA4,749,0089.54%
13Riverside-San Bernardino-Ontario, CA MSA4,599,8398.88%
14Detroit–Warren–Dearborn, MI MSA4,392,0412.23%
15Seattle-Tacoma-Bellevue, WA MSA4,018,76216.83%
16Minneapolis-St. Paul-Bloomington, MN-WI MSA3,690,26110.26%
17San Diego-Chula Vista-Carlsbad, CA MSA3,298,6346.57%
18Tampa-St. Petersburg-Clearwater, FL MSA3,175,27514.09%
19Denver-Aurora-Lakewood, CO MSA2,963,82116.53%
20Baltimore-Columbia-Towson, MD MSA2,844,5104.94%
21St. Louis, MO-IL MSA2,820,2531.17%
22Orlando-Kissimmee-Sanford, FL MSA2,673,37625.25%
23Charlotte-Concord-Gastonia, NC-SC MSA2,660,32918.56%
24San Antonio-New Braunfels, TX MSA2,558,14319.40%
25Portland-Vancouver-Hillsboro, OR-WA MSA2,512,85912.89%
26Sacramento-Roseville-Folsom, CA MSA2,397,38211.55%
27Pittsburgh, PA MSA2,370,9300.62%
28Austin-Round Rock-Georgetown, TX MSA2,283,37133.04%
29Las Vegas-Henderson-Paradise, NV MSA2,265,46116.10%
30Cincinnati, OH-KY-IN MSA2,256,8845.58%
31Kansas City, MO-KS MSA2,192,0359.09%
32Columbus, OH MSA2,138,92612.46%
33Indianapolis-Carmel-Anderson, IN MSA2,111,04011.82%
34Cleveland-Elyria, OH MSA2,088,2510.53%
35San Juan-Bayamón-Caguas, PR Metropolitan Statistical Area2,002,906-14.77%
36San Jose-Sunnyvale-Santa Clara, CA MSA2,000,4688.90%
37Nashville-Davidson–Murfreesboro–Franklin, TN MSA1,989,51920.86%
38Virginia Beach-Norfolk-Newport News, VA-NC MSA1,799,6745.00%
39Providence-Warwick, RI-MA MSA1,676,5794.73%
40Jacksonville, FL MSA1,605,84819.34%
41Milwaukee-Waukesha, WI MSA1,574,7311.21%
42Oklahoma City, OK MSA1,425,69513.78%
43Raleigh-Cary, NC MSA1,413,98225.08%
44Memphis, TN-MS-AR MSA1,337,7791.65%
45Richmond, VA MSA1,314,43410.78%
46Louisville/Jefferson County, KY-IN MSA1,285,4396.88%
47New Orleans-Metairie, LA MSA1,271,8456.89%
48Salt Lake City, UT MSA1,257,93615.63%
49Hartford-East Hartford-Middletown, CT MSA1,213,5310.09%
50Buffalo-Niagara Falls, NY MSA1,166,9022.76%
51Birmingham-Hoover, AL MSA1,115,2895.11%
52Rochester, NY MSA1,090,1350.97%
53Grand Rapids-Kentwood, MI MSA1,087,5929.45%
54Tucson, AZ MSA1,043,4336.44%
55Urban Honolulu, HI MSA1,016,5086.64%
56Tulsa, OK MSA1,015,3318.30%
57Fresno, CA MSA1,008,6548.40%
58Worcester, MA-CT MSA978,5296.71%
59Omaha-Council Bluffs, NE-IA MSA967,60411.82%
60Bridgeport-Stamford-Norwalk, CT MSA957,4194.43%
61Greenville-Anderson, SC MSA928,19512.63%
62Albuquerque, NM MSA916,5283.32%
63Bakersfield, CA MSA909,2358.29%
64Albany-Schenectady-Troy, NY MSA899,2623.28%
65Knoxville, TN MSA879,7737.96%
66McAllen-Edinburg-Mission, TX MSA870,78112.39%
67Baton Rouge, LA MSA870,5695.41%
68El Paso, TX MSA868,8598.05%
69New Haven-Milford, CT MSA864,8350.27%
70Allentown-Bethlehem-Easton, PA-NJ MSA861,8894.96%
71Oxnard-Thousand Oaks-Ventura, CA MSA843,8432.49%
72North Port-Sarasota-Bradenton, FL MSA833,71618.72%
73Columbia, SC MSA829,4708.06%
74Dayton-Kettering, OH MSA814,0491.85%
75Charleston-North Charleston, SC MSA799,63620.32%
76Stockton, CA MSA779,23313.71%
77Greensboro-High Point, NC MSA776,5667.29%
78Boise City, ID MSA764,71824.03%
79Cape Coral-Fort Myers, FL MSA760,82222.96%
80Colorado Springs, CO MSA755,10516.96%
81Little Rock-North Little Rock-Conway, AR MSA748,0316.90%
82Lakeland-Winter Haven, FL MSA725,04620.42%
83Des Moines-West Des Moines, IA MSA709,46616.98%
84Akron, OH MSA702,219-0.14%
85Springfield, MA MSA699,1620.90%
86Poughkeepsie-Newburgh-Middletown, NY MSA697,2214.02%
87Ogden-Clearfield, UT MSA694,86316.36%
88Madison, WI MSA680,79612.45%
89Winston-Salem, NC MSA675,9665.52%
90Provo-Orem, UT MSA671,18527.41%
91Deltona-Daytona Beach-Ormond Beach, FL MSA668,92113.32%
92Syracuse, NY MSA662,057-0.08%
93Durham-Chapel Hill, NC MSA649,90315.18%
94Wichita, KS MSA647,6103.94%
95Toledo, OH MSA646,604-0.74%
96Augusta-Richmond County, GA-SC MSA611,0008.17%
97Palm Bay-Melbourne-Titusville, FL MSA606,61211.64%
98Jackson, MS MSA591,9780.97%
99Harrisburg-Carlisle, PA MSA591,7127.69%
100Spokane-Spokane Valley, WA MSA585,78413.80%
101Scranton–Wilkes-Barre, PA MSA567,5590.70%
102Chattanooga, TN-GA MSA562,6476.53%
103Lancaster, PA MSA552,9846.46%
104Modesto, CA MSA552,8787.47%
105Portland-South Portland, ME MSA551,7407.32%
106Fayetteville-Springdale-Rogers, AR MSA546,72524.22%
107Lansing-East Lansing, MI MSA541,2971.24%
108Youngstown-Warren-Boardman, OH-PA MSA541,243-4.34%
109Fayetteville, NC MSA520,3788.17%
110Lexington-Fayette, KY MSA516,8119.47%
111Pensacola-Ferry Pass-Brent, FL MSA509,90513.57%
112Huntsville, AL MSA491,72317.75%
113Reno, NV MSA490,59615.32%
114Santa Rosa-Petaluma, CA MSA488,8631.03%
115Myrtle Beach-Conway-North Myrtle Beach, SC-NC MSA487,72229.46%
116Port St. Lucie, FL MSA487,65714.98%
117Lafayette, LA MSA478,3842.49%
118Springfield, MO MSA475,4328.87%
119Killeen-Temple, TX MSA475,36717.29%
120Visalia, CA MSA473,1177.00%
121Asheville, NC MSA469,01510.39%
122York-Hanover, PA MSA456,4384.94%
123Vallejo, CA MSA453,4919.71%
124Santa Maria-Santa Barbara, CA MSA448,2295.74%
125Salinas, CA MSA439,0355.78%
126Salem, OR MSA433,35310.91%
127Mobile, AL MSA430,197-0.09%
128Reading, PA MSA428,8494.23%
129Manchester-Nashua, NH MSA422,9375.54%
130Corpus Christi, TX MSA421,9334.17%
131Brownsville-Harlingen, TX MSA421,0173.64%
132Fort Wayne, IN MSA419,6017.97%
133Salisbury, MD-DE MSA418,04611.84%
134Gulfport-Biloxi, MS MSA416,2597.15%
135Flint, MI MSA406,211-4.60%
136Savannah, GA MSA404,79816.45%
137Peoria, IL MSA402,391-3.33%
138Canton-Massillon, OH MSA401,574-0.70%
139Anchorage, AK MSA398,3284.60%
140Beaumont-Port Arthur, TX MSA397,5652.27%
141Shreveport-Bossier City, LA MSA393,406-1.30%
142Trenton-Princeton, NJ MSA387,3405.68%
143Montgomery, AL MSA386,0473.07%
144Davenport-Moline-Rock Island, IA-IL MSA384,3241.22%
145Tallahassee, FL MSA384,2984.60%
146Eugene-Springfield, OR MSA382,9718.89%
147Ocala, FL MSA375,90813.47%
148Naples-Marco Island, FL MSA375,75216.87%
149Ann Arbor, MI MSA372,2587.97%
150Hickory-Lenoir-Morganton, NC MSA365,276-0.06%
151Huntington-Ashland, WV-KY-OH MSA359,862-2.98%
152Fort Collins, CO MSA359,06619.84%
153Lincoln, NE MSA340,21712.60%
154Gainesville, FL MSA339,24711.20%
155Rockford, IL MSA338,798-3.04%
156Boulder, CO MSA330,75812.29%
157Greeley, CO MSA328,98130.12%
158Columbus, GA-AL MSA328,8836.85%
159Green Bay, WI MSA328,2687.19%
160Spartanburg, SC MSA327,99715.37%
161South Bend-Mishawaka, IN-MI MSA324,5011.65%
162Lubbock, TX MSA321,36810.51%
163Clarksville, TN-KY MSA320,53517.01%
164Roanoke, VA MSA315,2512.12%
165Evansville, IN-KY MSA314,0490.80%
166Kingsport-Bristol, TN-VA MSA307,614-0.62%
167Kennewick-Richland, WA MSA303,62219.85%
168Olympia-Lacey-Tumwater, WA MSA294,79316.86%
169Hagerstown-Martinsburg, MD-WV MSA293,8449.18%
170Utica-Rome, NY MSA292,264-2.38%
171Duluth, MN-WI MSA291,6380.34%
172Crestview-Fort Walton Beach-Destin, FL MSA286,97321.67%
173Longview, TX MSA286,1842.21%
174Aguadilla-Isabela, PR Metropolitan Statistical Area286,064-15.72%
175Wilmington, NC MSA285,90512.17%
176San Luis Obispo-Paso Robles, CA MSA282,4244.74%
177Merced, CA MSA281,2029.93%
178Waco, TX MSA277,5479.80%
179Sioux Falls, SD MSA276,73021.23%
180Cedar Rapids, IA MSA276,5207.20%
181Bremerton-Silverdale-Port Orchard, WA MSA275,6119.75%
182Atlantic City-Hammonton, NJ MSA274,534-0.01%
183Erie, PA MSA270,876-3.45%
184Santa Cruz-Watsonville, CA MSA270,8613.23%
185Amarillo, TX MSA268,7616.68%
186Tuscaloosa, AL MSA268,67412.32%
187Norwich-New London, CT MSA268,555-2.01%
188College Station-Bryan, TX MSA268,24817.31%
189Laredo, TX MSA267,1146.72%
190Kalamazoo-Portage, MI MSA261,6704.53%
191Lynchburg, VA MSA261,5933.55%
192Charleston, WV MSA258,859-6.89%
193Yakima, WA MSA256,7285.55%
194Fargo, ND-MN MSA249,84319.67%
195Binghamton, NY MSA247,138-1.82%
196Fort Smith, AR-OK MSA244,310-1.57%
197Appleton, WI MSA243,1477.75%
198Prescott Valley-Prescott, AZ MSA236,20911.93%
199Macon-Bibb County, GA MSA233,8020.65%
200Tyler, TX MSA233,47911.33%
201Topeka, KS MSA233,152-0.31%
202Daphne-Fairhope-Foley, AL MSA231,76727.16%
203Barnstable Town, MA MSA228,9966.07%
204Bellingham, WA MSA226,84712.78%
205Rochester, MN MSA226,3299.40%
206Burlington-South Burlington, VT MSA225,5626.77%
207Lafayette-West Lafayette, IN MSA223,7166.38%
208Medford, OR MSA223,2599.87%
209Champaign-Urbana, IL MSA222,5382.17%
210Lake Charles, LA MSA222,40211.42%
211Charlottesville, VA MSA221,5249.91%
212Las Cruces, NM MSA219,5614.94%
213Hilton Head Island-Bluffton-Beaufort, SC MSA215,90815.45%
214Athens-Clarke County, GA MSA215,41511.88%
215Lake Havasu City-Kingman, AZ MSA213,2676.53%
216Chico, CA MSA211,632-3.80%
217Ponce, PR Metropolitan Statistical Area211,465-19.48%
218Columbia, MO MSA210,86410.76%
219Springfield, IL MSA208,640-0.73%
220Johnson City, TN MSA207,2854.31%
221Houma-Thibodaux, LA MSA207,137-0.50%
222Monroe, LA MSA207,1041.31%
223Elkhart-Goshen, IN MSA207,0474.80%
224Jacksonville, NC MSA204,57615.08%
225Yuma, AZ MSA203,8814.15%
226Gainesville, GA MSA203,13613.05%
227Florence, SC MSA199,964-2.73%
228St. Cloud, MN MSA199,6715.59%
229Bend, OR MSA198,25325.69%
230Racine, WI MSA197,7271.19%
231Warner Robins, GA MSA191,61414.33%
232Saginaw, MI MSA190,124-5.02%
233Punta Gorda, FL MSA186,84716.80%
234Terre Haute, IN MSA185,031-2.49%
235Billings, MT MSA184,16710.17%
236Redding, CA MSA182,1552.78%
237Dover, DE MSA181,85112.04%
238Kingston, NY MSA181,851-0.35%
239Joplin, MO MSA181,4093.36%
240Yuba City, CA MSA181,2088.58%
241Jackson, TN MSA180,5040.45%
242St. George, UT MSA180,27930.53%
243El Centro, CA MSA179,7022.96%
244Bowling Green, KY MSA179,63913.27%
245Abilene, TX MSA176,5796.85%
246Muskegon, MI MSA175,8242.11%
247Iowa City, IA MSA175,41914.96%
248Midland, TX MSA175,22023.68%
249Panama City, FL MSA175,2163.77%
250Auburn-Opelika, AL MSA174,24124.24%
251Arecibo, PR Metropolitan Statistical Area173,218-13.16%
252Hattiesburg, MS MSA172,2316.05%
253Eau Claire, WI MSA172,0076.74%
254Oshkosh-Neenah, WI MSA171,7302.84%
255Burlington, NC MSA171,41513.42%
256Coeur d'Alene, ID MSA171,36223.73%
257Bloomington, IL MSA170,9540.81%
258Greenville, NC MSA170,2431.25%
259Waterloo-Cedar Falls, IA MSA168,4610.38%
260East Stroudsburg, PA MSA168,327-0.89%
261Pueblo, CO MSA168,1625.72%
262Wausau-Weston, WI MSA166,4282.22%
263Blacksburg-Christiansburg, VA MSA166,3782.10%
264Odessa, TX MSA165,17120.45%
265Kahului-Wailuku-Lahaina, HI MSA164,7546.41%
266Janesville-Beloit, WI MSA163,6872.09%
267Bloomington, IN MSA161,0390.93%
268Jackson, MI MSA160,3660.07%
269Sebastian-Vero Beach, FL MSA159,78815.76%
270State College, PA MSA158,1722.72%
271Idaho Falls, ID MSA157,42918.13%
272Decatur, AL MSA156,4941.73%
273Madera, CA MSA156,2553.57%
274Chambersburg-Waynesboro, PA MSA155,9324.22%
275Grand Junction, CO MSA155,7036.12%
276Elizabethtown-Fort Knox, KY MSA155,5724.88%
277Santa Fe, NM MSA154,8237.39%
278Monroe, MI MSA154,8091.83%
279Niles, MI MSA154,316-1.59%
280Vineland-Bridgeton, NJ MSA154,152-1.75%
281Homosassa Springs, FL MSA153,8438.93%
282Hanford-Corcoran, CA MSA152,486-0.32%
283Bangor, ME MSA152,199-1.12%
284Alexandria, LA MSA152,192-1.12%
285Dothan, AL MSA151,0073.69%
286Florence-Muscle Shoals, AL MSA150,7912.48%
287Jefferson City, MO MSA150,3090.34%
288Sioux City, IA-NE-SD MSA149,9404.43%
289Albany, GA MSA148,922-3.21%
290Wichita Falls, TX MSA148,128-2.10%
291Valdosta, GA MSA148,1266.12%
292Texarkana, TX-AR MSA147,519-1.13%
293Logan, UT-ID MSA147,34817.46%
294Flagstaff, AZ MSA145,1017.95%
295Rocky Mount, NC MSA143,870-5.59%
296Lebanon, PA MSA143,2577.25%
297Dalton, GA MSA142,8370.43%
298Morristown, TN MSA142,7094.47%
299Winchester, VA-WV MSA142,63211.02%
300Morgantown, WV MSA140,0387.96%
301La Crosse-Onalaska, WI-MN MSA139,6274.46%
302Wheeling, WV-OH MSA139,513-5.70%
303Rapid City, SD MSA139,07410.04%
304Napa, CA MSA138,0191.12%
305Sumter, SC MSA136,700-4.02%
306Springfield, OH MSA136,001-1.69%
307Harrisonburg, VA MSA135,5718.26%
308Sherman-Denison, TX MSA135,54312.13%
309Battle Creek, MI MSA134,310-1.35%
310Jonesboro, AR MSA134,19610.88%
311Manhattan, KS MSA134,0465.48%
312Bismarck, ND MSA133,62620.79%
313Johnstown, PA MSA133,472-7.10%
314Carbondale-Marion, IL MSA133,435-4.11%
315Hammond, LA MSA133,1579.96%
316The Villages, FL MSA129,75238.89%
317Mount Vernon-Anacortes, WA MSA129,52310.80%
318Pittsfield, MA MSA129,026-1.67%
319Albany-Lebanon, OR MSA128,61010.23%
320Glens Falls, NY MSA127,039-1.46%
321Lawton, OK MSA126,652-2.79%
322Cleveland, TN MSA126,1648.96%
323Sierra Vista-Douglas, AZ MSA125,447-4.49%
324Staunton, VA MSA125,4335.85%
325Ames, IA MSA125,2528.12%
326Mansfield, OH MSA124,9360.37%
327San Angelo, TX MSA122,8888.78%
328Altoona, PA MSA122,822-3.36%
329New Bern, NC MSA122,168-3.65%
330Wenatchee, WA MSA122,01210.04%
331Farmington, NM MSA121,661-6.45%
332Owensboro, KY MSA121,5595.93%
333St. Joseph, MO-KS MSA121,467-4.60%
334San Germán, PR Metropolitan Statistical Area120,280-12.50%
335Lawrence, KS MSA118,7857.18%
336Sheboygan, WI MSA118,0342.19%
337Missoula, MT MSA117,9227.89%
338Goldsboro, NC MSA117,333-4.31%
339Weirton-Steubenville, WV-OH MSA116,903-6.07%
340Watertown-Fort Drum, NY MSA116,7210.42%
341Anniston-Oxford, AL MSA116,441-1.80%
342Beckley, WV MSA115,079-7.86%
343Twin Falls, ID MSA114,28314.74%
344Williamsport, PA MSA114,188-1.66%
345California-Lexington Park, MD MSA113,7778.20%
346Brunswick, GA MSA113,4951.00%
347Michigan City-La Porte, IN MSA112,4170.85%
348Muncie, IN MSA111,903-4.90%
349Lewiston-Auburn, ME MSA111,1393.19%
350Longview, WA MSA110,7308.12%
351Kankakee, IL MSA107,502-5.24%
352Ithaca, NY MSA105,7404.11%
353Grand Forks, ND-MN MSA104,3625.99%
354Fond du Lac, WI MSA104,1542.48%
355Decatur, IL MSA103,998-6.11%
356Bay City, MI MSA103,856-3.63%
357Gettysburg, PA MSA103,8522.41%
358Mankato, MN MSA103,5667.06%
359Gadsden, AL MSA103,436-0.95%
360Lima, OH MSA102,206-3.88%
361Sebring-Avon Park, FL MSA101,2352.48%
362Cheyenne, WY MSA100,5129.56%
363Hot Springs, AR MSA100,1804.33%
364Dubuque, IA MSA99,2665.99%
365Rome, GA MSA98,5842.35%
366Victoria, TX MSA98,3314.60%
367Cape Girardeau, MO-IL MSA97,5171.29%
368Fairbanks, AK MSA95,655-1.97%
369Ocean City, NJ MSA95,263-2.06%
370Corvallis, OR MSA95,18411.22%
371Cumberland, MD-WV MSA95,044-7.99%
372Pocatello, ID MSA94,8964.68%
373Mayagüez, PR Metropolitan Statistical Area93,412-19.62%
374Parkersburg-Vienna, WV MSA89,490-3.43%
375Grants Pass, OR MSA88,0906.50%
376Pine Bluff, AR MSA87,751-12.47%
377Great Falls, MT MSA84,4143.80%
378Elmira, NY MSA84,148-5.27%
379Yauco, PR Metropolitan Statistical Area84,112-21.63%
380Kokomo, IN MSA83,6581.09%
381Midland, MI MSA83,494-0.16%
382Bloomsburg-Berwick, PA MSA82,863-3.15%
383Columbus, IN MSA82,2087.05%
384Hinesville, GA MSA81,4244.50%
385Casper, WY MSA79,9555.97%
386Grand Island, NE MSA77,0385.93%
387Danville, IL MSA74,188-9.11%
388Guayama, PR Metropolitan Statistical Area72,240-14.22%
389Lewiston, ID-WA MSA64,3755.73%
390Enid, OK MSA62,8463.74%
391Walla Walla, WA MSA62,5846.47%
392Carson City, NV MSA58,6396.09%

From Metro to Micro

The wide variety of population patterns around the country can make it tricky to divide regions up into uniform units. There are two main divisions to consider when viewing this map:

  1. Metropolitan Areas (metro areas) have at least one urban core area of at least 50,000 population. These are the largest population centers, sometimes encompassing many counties. In some instances, these metro areas are further subdivided into Metropolitan Divisions.
  2. Micropolitan Areas are the smallest areas measured on this map (indicated by a lighter shade of green). These smaller regions, which are generally located further away from large cities, have at least one urban core area of at least 10,000 but fewer than 50,000 people.

One thing to note about all of these definitions is that the cities in these regions must have significant ties to a neighboring region—usually in the form of commuting ties. This is what warrants binding adjacent counties into a measurable area.

Another unique layer of data on this map is the shading that indicates the actual urbanized area within metro areas. In the example of Atlanta-Sandy Springs-Alpharetta, it’s easy to see how urban sprawl has expanded the urban area into a number of neighboring counties.

With this context in mind, we’ll take a closer look at three points of interest on the map that show this concept at work with varying degrees of complexity.

Level One: The Central City

The Texas Triangle offers what is perhaps the most straightforward example of metro areas.

central texas metro areas

As seen above, Houston, Austin, and San Antonio anchor their respective regions, and surrounding counties are bundled into a metro area. The surrounding counties have all been identified as having ties to the central county, and, in some cases, the urban area has spread into the neighboring county over time.

Level Two: The City Cluster

The region anchored by Salt Lake City requires more thought to divide into statistical areas.

salt lake city metro area

While there are a number of population centers in the area, including Salt Lake City, Provo, and Ogden, they all have enough of an economic “magnetic pull” to warrant splitting the region into distinct statistical areas.

Of course, regions are always evolving, and occasionally these areas are updated. Salt Lake City and Ogden were previously combined into a single metro area, but were separated in 2005.

Level Three: The Megaregion

New York City is the ultimate challenge for planners looking to categorize population centers into a neat and tidy statistical box.

For one, the contiguous urban area is massive, stretching from the west side of Long Island out to the east side of New Jersey. In addition to New York City itself, the metro area includes 19 other municipalities with over 100,000 people.

Next, NYC is an unparalleled economic magnet. Measuring commuting activity is a challenge because a wide variety of people visit the city for so many different reasons. The interconnectedness of the Northeast Megaregion also adds to the complexity.

new york city metro area

New York-Newark-Jersey City is such a big pie to carve up, that four of the country’s 11 metro divisions (as indicated by the italicized text and dotted lines) occur in this one area.

Blurring the Lines

Population patterns are constantly changing across the country, so the next version of this map may have a number of changes on it. Our “straightforward” Texas Triangle example may become tougher to divide up as the population boom continues in the region.

Here’s how the population of U.S. countries changed over the past decade:

population change U.S. 2010-2020

Further complicating matters is the rapid move to remote work and distributed teams. A key element of these census divisions are commuting ties. With work increasingly not bound by geographic limitations, it remains unclear how that trend will impact this type of statistical exercise in the future.

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Misc

Explainer: What to Know About Monkeypox

What is monkeypox, and what risk does it pose to the public? This infographic breaks down the symptoms, transmission, and more.

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Explainer: What to Know About Monkeypox

The COVID-19 pandemic is still fresh in the minds of the people around the world, so it comes as no surprise that recent outbreaks of another virus are grabbing headlines.

Monkeypox outbreaks have now been reported in multiple countries, and it has scientists paying close attention. For everyone else, numerous questions come to the surface:

  • How serious is this virus?
  • How contagious is it?
  • Could monkeypox develop into a new pandemic?

Below, we answer these questions and more.

What is Monkeypox?

Monkeypox is a virus in the Orthopoxvirus genus which also includes the variola virus (which causes smallpox) and the cowpox virus. The primary symptoms include fever, swollen lymph nodes, and a distinctive bumpy rash.

There are two major strains of the virus that pose very different risks:

  • Congo Basin strain: 1 in 10 people infected with this strain have died
  • West African strain: Approximately 1 in 100 people infected with this strain died

At the moment, health authorities in the UK have indicated they’re seeing the milder strain in patients there.

Where did Monkeypox Originate From?

The virus was originally discovered in the Democratic Republic of Congo in monkeys kept for research purposes (hence the name). Eventually, the virus made the jump to humans more than a decade after its discovery in 1958.

It is widely assumed that vaccination against another similar virus, smallpox, helped keep monkeypox outbreaks from occurring in human populations. Ironically, the successful eradication of smallpox, and eventual winding down of that vaccine program, has opened the door to a new viral threat. There is now a growing population of people who no longer have immunity against the virus.

Now that travel restrictions are lifting in many parts of the world, viruses are now able to hop between nations again. As of the publishing of this article, a handful of cases have now been reported in the U.S., Canada, the UK, and a number of European countries.

On the upside, contact tracing has helped authorities piece together the transmission of the virus. While cases are rare in Europe and North America, it is considered endemic in parts of West Africa. For example, the World Health Organization reports that Nigeria has experienced over 550 reported monkeypox cases from 2017 to today. The current UK outbreak originated from an individual who returned from a trip to Nigeria.

Could Monkeypox become a new pandemic?

Monkeypox, which primarily spreads through animal-to-human interaction, is not known to spread easily between humans. Most individuals infected with monkeypox pass the virus to between zero and one person, so outbreaks typically fizzle out. For this reason, the fact that outbreaks are occurring in several countries simultaneously is concerning for health authorities and organizations that monitor viral transmission. Experts are entertaining the possibility that the virus’ rate of transmission has increased.

Images of people covered in monkeypox lesions are shocking, and people are understandably concerned by this virus, but the good news is that members of the general public have little to fear at this stage.

I think the risk to the general public at this point, from the information we have, is very, very low.
–Tom Inglesby, Director, Johns Hopkins Center for Health Security

» For up-to-date information on monkeypox cases, check out Global.Health’s tracking spreadsheet

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Misc

The Top 10 Largest Nuclear Explosions, Visualized

Just how powerful are nuclear bombs? Here’s a look at the top 10 largest nuclear explosions.

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infographic comparing the top 10 largest nuclear explosions

The Top 10 Largest Nuclear Explosions, Visualized

Just how powerful are nuclear explosions?

The U.S.’ Trinity test in 1945, the first-ever nuclear detonation, released around 19 kilotons of explosive energy. The explosion instantly vaporized the tower it stood on and turned the surrounding sand into green glass, before sending a powerful heatwave across the desert.

As the Cold War escalated in the years after WWII, the U.S. and the Soviet Union tested bombs that were at least 500 times greater in explosive power. This infographic visually compares the 10 largest nuclear explosions in history.

The Anatomy of a Nuclear Explosion

After exploding, nuclear bombs create giant fireballs that generate a blinding flash and a searing heatwave. The fireball engulfs the surrounding air, getting larger as it rises like a hot air balloon.

As the fireball and heated air rise, they are flattened by cooler, denser air high up in the atmosphere, creating the mushroom “cap” structure. At the base of the cloud, the fireball causes physical destruction by sending a shockwave moving outwards at thousands of miles an hour.

anatomy of a nuclear explosion's mushroom cloud

A strong updraft of air and dirt particles through the center of the cloud forms the “stem” of the mushroom cloud. In most atomic explosions, changing atmospheric pressure and water condensation create rings that surround the cloud, also known as Wilson clouds.

Over time, the mushroom cloud dissipates. However, it leaves behind radioactive fallout in the form of nuclear particles, debris, dust, and ash, causing lasting damage to the local environment. Because the particles are lightweight, global wind patterns often distribute them far beyond the place of detonation.

With this context in mind, here’s a look at the 10 largest nuclear explosions.

#10: Ivy Mike (1952)

In 1952, the U.S. detonated the Mike device—the first-ever hydrogen bomb—as part of Operation Ivy. Hydrogen bombs rely on nuclear fusion to amplify their explosions, producing much more explosive energy than atomic bombs that use nuclear fission.

Weighing 140,000 pounds (63,500kg), the Ivy Mike test generated a yield of 10,400 kilotons, equivalent to the explosive power of 10.4 million tons of TNT. The explosion was 700 times more powerful than Little Boy, the bomb dropped on Hiroshima in 1945.

#9: Castle Romeo (1954)

Castle Romeo was part of the Operation Castle series of U.S. nuclear tests taking place on the Marshall Islands. Shockingly, the U.S. was running out of islands to conduct tests, making Romeo the first-ever test conducted on a barge in the ocean.

At 11,000 kilotons, the test produced more than double its predicted explosive energy of 4,000 kilotons. Its fireball, as seen below, is one of the most iconic images ever captured of a nuclear explosion.

iconic image of the castle romeo nuclear explosion of 1954

#8: Soviet Test #123 (1961)

Test #123 was one of the 57 tests conducted by the Soviet Union in 1961. Most of these tests were conducted on the Novaya Zemlya archipelago in Northwestern Russia. The bomb yielded 12,500 kilotons of explosive energy, enough to vaporize everything within a 2.1 mile (3.5km) radius.

#7: Castle Yankee (1954)

Castle Yankee was the fifth test in Operation Castle. The explosion marked the second-most powerful nuclear test by the U.S.

It yielded 13,500 kilotons, much higher than the predicted yield of up to 10,000 kilotons. Within four days of the blast, its fallout reached Mexico City, roughly 7,100 miles (11,400km) away.

#6: Castle Bravo (1954)

Castle Bravo, the first of the Castle Operation series, accidentally became the most powerful nuclear bomb tested by the U.S.

Due to a design error, the explosive energy from the bomb reached 15,000 kilotons, two and a half times what was expected. The mushroom cloud climbed up to roughly 25 miles (40km).

As a result of the test, an area of 7,000 square miles was contaminated, and inhabitants of nearby atolls were exposed to high levels of radioactive fallout. Traces of the blast were found in Australia, India, Japan, and Europe.

#5, #4, #3: Soviet Tests #173, #174, #147 (1962)

In 1962, the Soviet Union conducted 78 nuclear tests, three of which produced the fifth, fourth, and third-most powerful explosions in history. Tests #173, #174, and #147 each yielded around 20,000 kilotons. Due to the absolute secrecy of these tests, no photos or videos have been released.

#2: Soviet Test #219 (1962)

Test #219 was an atmospheric nuclear test carried out using an intercontinental ballistic missile (ICBM), with the bomb exploding at a height of 2.3 miles (3.8km) above sea level. It was the second-most powerful nuclear explosion, with a yield of 24,200 kilotons and a destructive radius of ~25 miles (41km).

#1: Tsar Bomba (1961)

Tsar Bomba, also called Big Ivan, needed a specially designed plane because it was too heavy to carry on conventional aircraft. The bomb was attached to a giant parachute to give the plane time to fly away.

The explosion, yielding 50,000 kilotons, obliterated an abandoned village 34 miles (55km) away and generated a 5.0-5.25 magnitude earthquake in the surrounding region. Initially, it was designed as a 100,000 kiloton bomb, but its yield was cut to half its potential by the Soviet Union. Tsar Bomba’s mushroom cloud breached through the stratosphere to reach a height of over 37 miles (60km), roughly six times the flying height of commercial aircraft.

The two bombs dropped on Hiroshima and Nagasaki had devastating consequences, and their explosive yields were only a fraction of the 10 largest explosions. The power of modern nuclear weapons makes their scale of destruction truly unfathomable, and as history suggests, the outcomes can be unpredictable.

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