Animation: Visualizing Two Centuries of U.S. Immigration
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Visualizing Two Centuries of U.S. Immigration

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Animation: Visualizing Two Centuries of U.S. Immigration

America is a nation of immigrants, and though the country has seen a lot of new arrivals over the past two centuries, the rate of immigration has been far from steady.

War, famine, economic boom and bust, religious persecution, and government intervention have all caused wild swings in the rate of immigration from countries around the world.

Today’s striking animation, by Max Galka, is a great way to see changes in immigration over time. Inflows from specific countries rise and fall, and the top three countries of origin change numerous times over the years.

Below, is another way to look at the ebb and flow of American immigration since the early 1800s.

U.S. Immigration Charts
An important note. This data excludes forced migration (slavery) and illegal immigration.

Let’s look at the “waves” in more detail.

Wave one: The Old Immigration

From 1820 to 1870, over 7.5 million immigrants made their way over to the United States, effectively doubling the young country’s population in only half a decade.

Ireland, which was in the throes of the Potato Famine, saw half its population set sail for the U.S. during that time. This wave of immigration can still be seen in today’s demographics. There are now more Irish-Americans than there are Irish nationals.

The magnetic pull of the New World was profoundly felt in Germany as well. Growing public unrest in the region, caused by heavy taxation and political censorship, culminated in the German revolutions of 1848-49. Faced with severe hardship at home, millions of Germans made their way to America over the 1800s. It’s estimated that one-third of the total ethnic German population in the world now lives in the United States.

Wave Two: Gold Rush

Much of America’s early immigration was from various points in Europe, but there was one prominent exception: China.

The discovery of gold in California inspired Chinese workers to seek their fortune in America. After a crop failure in Southern China in 1852, tens of thousands of Chinese immigrants flooded into San Francisco.

Although the State of California was making millions of dollars off its Foreign Miners Tax, sentiment towards Chinese workers began to sour. Gold mines were being tapped out and white Californians blamed the Chinese for driving wages down.

Chinamen are getting to be altogether too plentiful in this country.

– John Bigler, Governor of California (1852-1856)

By 1882, the newly enacted the Chinese Exclusion Act had a chilling effect on Chinese immigration. The Exclusion Act has the dubious distinction of being the only American law barring a specific group from immigrating to the United States.

Wave Three: The New Immigration

The wave of immigration leading into the 20th century is referred to as The New Immigration.

In 1890, Ellis Island was designated as the main point of entry for newcomers entering the United States. In 1907 alone, Ellis Island processed a staggering 1,285,349 immigrants. To put this number in perspective, if all of those people settled in one place, they would’ve formed America’s fourth largest city almost overnight.

This massive influx of people into New York had profound implications on the city itself. In 1910, Manhattan’s population density was an astronomical 101,548 humans per square mile.

The immigrants arriving during this period – heavily represented by Italians, Hungarians, and Russians – were seeking religious freedom and economic opportunity. Certain industries, such as steel, meat-packing, and mining, were staffed by many new arrivals to the country.

During this time, one in four American workers were foreign-born.

The Great Depression

The National Origins Act’s quota system, which took effect in 1929, essentially slammed the door on most immigrants from Southern and Eastern Europe. Shortly after, the Great Depression further put a damper on immigration that would last well into the 20th century.

Wave Four: Mexico

After decades of sluggish immigration, the United States’ percentage of foreign-born citizens reached a low of 4.7% in 1970. But that was all about to change.

During the next decade, the number of states where Mexico was the top country of origin doubled in a single decade, and Mexicans became the dominant foreign-born population in the country. This migration was fueled by the Latin American debt crisis and later by NAFTA. The influx of cheap corn into Mexico caused hundreds of thousands of Mexicans from rural areas to search for more favorable economic opportunities. America was the obvious choice, particularly during the economic expansion of the 1990s.

U.S. Hispanic Population Map

This wave of immigration has shifted the country’s demographics considerably. Today, nearly one in five people in the United States are Hispanic.

Current Trends

Immigration trends are continually evolving, and America’s newest immigrants are often more likely to come from China or India. In fact, both countries surpassed Mexico as countries of origin for immigrants arriving in the U.S. in 2013. Today, the trend is even more pronounced.

us immigration top 5

Recent immigration numbers indicate that Asian immigrants will continue to shift America’s demographics in a new direction. Perhaps a new wave in the making?

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Demographics

Visualizing the World’s Most Popular Religions

This graphic shows a breakdown of the world’s major religions, and how much of the global population follows each one.

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World's Religions

Visualizing the World’s Most Popular Religions

According to some estimates, there are over 4,000 religions, faiths groups, and denominations that exist around the world today. Researchers and academics generally categorize the world’s religions into five major groups: Christianity, Islam, Buddhism, Hinduism, and Judaism.

This graphic by Chit Chart visualizes the most popular religions around the world, using the latest available data from Index Mundi’s world demographics.

In addition to the five major religious groups, the graphic includes two more categories: one for a collective of Folk religions and another for people who are unaffiliated with a religion.

The Religions with the Most Followers

Although the number of people who follow a religion has decreased in recent decades, 82.8% of the global population still identifies with one of the world’s major religions.

Here’s a breakdown of the most popular religions, ranked by their following as a percentage of the world’s population:

RankReligion% of World’s Population
1Christian31.4%
2Muslim23.2%
3Unaffiliated16.4%
4Hindu15.0%
5Buddhist7.1%
6Folk Religions5.9%
7Jewish0.2%
8Other0.8%

Christianity has the largest following with approximately 31% of the global population. Muslims make up the second-largest religious group, accounting for 23.2% of the world’s population.

Roughly 16.4% of the global population is unaffiliated with a religion. This figure exceeds the percentage of people who identify with Hinduism (15%), Buddhism (7.1%), Folk Religions (5.9%), or Judaism (0.2%).

The World’s Religions from Oldest to Newest

Hinduism is considered the oldest religion in the world, originating in the Indus River Valley (modern-day Pakistan) circa 7000 BCE.

While Judaism came after Hinduism, it is thought to be the oldest of the three monotheistic Abrahamic faiths, making it older than Christianity and Islam.

It began circa 2000 BCE in the Southern Levant (modern-day Israel, Palestine, and Jordan). By contrast, Christianity was founded in the 1st century and began as a movement within Judaism.

Scholars typically date the creation of Islam to the 7th century, making it the youngest of the world’s major religions on this list. Islam was established in Mecca (modern-day Saudi-Arabia).

One religion that’s not included on this list is Sikhism. Founded in the late 15th century, it’s relatively new, especially compared to other religions like Hinduism or Judaism. Yet, despite being new, Sikhism has a large following—according to some estimates, there are over 25 million Sikhs worldwide.

What are Folk Religions?

A folk religion is defined as an ethnic or cultural practice that exists outside the theological doctrine of organized religions.

Lacking sacred texts, Folk religions are more concerned with spirituality than rituals or rites. Examples of Folk religions include Native American traditions, Chinese folk religions, and traditional African religions.

Since Folk religions are less institutionalized, they are especially challenging to measure and often excluded from surveys. With that said, an estimated 5.9% of the global population (approximately 430 million people) practice a Folk religion.

The Fastest-Growing Religions

While Islam is the newest of the big five religions, it’s currently the world’s fastest-growing one too. For context, here’s the estimated percent change among the seven religion categories, between 2015 and 2060:

RankReligious GroupEst. % change in population size (2015-2060)
1Muslims70%
2Christians34%
3Hindus27%
4Jews15%
5Folk religions5%
6Unaffiliated3%
7Buddhists-7%

Islam’s rapid growth means it may surpass Christianity as the world’s largest religion within the next half-century. What’s causing this growth?

According to Pew Research Center, the main reason is simply demographics—on average, Muslim women have 2.9 children, which the average of all non-Muslims is 2.2.

Muslims are also concentrated in Africa and the Middle East, the two regions predicted to have the highest population increases in the next few decades.

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Demographics

Mapped: A Decade of Population Growth and Decline in U.S. Counties

This map shows which counties in the U.S. have seen the most growth, and which places have seen their populations dwindle in the last 10 years.

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A Decade of Population Growth and Decline in U.S. Counties

There are a number of factors that determine how much a region’s population changes.

If an area sees a high number of migrants, along with a strong birth rate and low death rate, then its population is bound to increase over time. On the flip side, if more people are leaving the area than coming in, and the region’s birth rate is low, then its population will likely decline.

Which areas in the United States are seeing the most growth, and which places are seeing their populations dwindle?

This map, using data from the U.S. Census Bureau, shows a decade of population movement across U.S. counties, painting a detailed picture of U.S. population growth between 2010 and 2020.

Counties With The Biggest Population Growth from 2010-2020

To calculate population estimates for each county, the U.S. Census Bureau does the following calculations:

A county’s base population → plus births → minus deaths → plus migration = new population estimate

 
From 2010 to 2020, Maricopa County in Arizona saw the highest increase in its population estimate. Over a decade, the county gained 753,898 residents. Below are the counties that saw the biggest increases in population:

RankCountyPoint of ReferenceStatePop. Growth (2010–2020)
#1Maricopa CountyPhoenix, ScottsdaleArizona+753,898
#2Harris CountyHoustonTexas+630,711
#3Clark CountyLas VegasNevada+363,323
#4King CountySeattleWashington+335,884
#5Tarrant CountyFort Worth, ArlingtonTexas+305,180
#6Bexar CountySan AntonioTexas+303,982
#7Riverside CountyRiverside, Palm SpringsCalifornia+287,626
#8Collin CountyPlanoTexas+284,967
#9Travis CountyAustinTexas+270,111
#10Hillsborough CountyTampaFlorida+264,446

Phoenix and surrounding areas grew faster than any other major city in the country. The region’s sunny climate and amenities are popular with retirees, but another draw is housing affordability. Families from more expensive markets—California in particular—are moving to the city in droves. This is a trend that spilled over into the pandemic era as more people moved into remote and hybrid work situations.

Texas counties saw a lot of growth as well, with five of the top 10 gainers located in the state of Texas. A big draw for Texas is its relatively affordable housing market. In 2021, average home prices in the state stood at $172,500$53,310 below the national average.

Counties With The Biggest Population Drops from 2010-2020

On the opposite end of the spectrum, here’s a look at the top 10 counties that saw the biggest declines in their populations over the decade:

RankCountyPoint of ReferenceStatePop. Growth (2010–2020)
#1Cook CountyChicagoIllinois-90,693
#2Wayne CountyDetroitMichigan-74,224
#3Cuyahoga CountyClevelandOhio-50,220
#4Genesee CountyFlintMichigan-20,165
#5Suffolk CountyLong IslandNew York-20,064
#6Caddo ParishShreveportLouisiana-18,173
#7Westmoreland CountyMurrysvillePennsylvania-17,942
#8Hinds CountyJacksonMississippi-17,751
#9Kanawha CountyCharlestonWest Virginia-16,672
#10Cambria CountyJohnstownPennsylvania-14,786

The largest drops happened in counties along the Great Lakes, including Cook County (which includes the city of Chicago) and Wayne County (which includes the city of Detroit).

For many of these counties, particularly those in America’s “Rust Belt”, population drops over this period were a continuation of decades-long trends. Wayne County is an extreme example of this trend. From 1970 to 2020, the area lost one-third of its population.

U.S. Population Growth in Percentage Terms (2010-2020)

While the map above is great at showing where the greatest number of Americans migrated, it downplays big changes in counties with smaller populations.

For example, McKenzie County in North Dakota, with a 2020 population of just 15,242, was the fastest-growing U.S. county over the past decade. The county’s 138% increase was driven primarily by the Bakken oil boom in the area. High-growth counties in Texas also grew as new sources of energy were extracted in rural areas.

The nation’s counties are evenly divided between population increase and decline, and clear patterns emerge.

population changes in u.s. counties (%)

Pandemic Population Changes

More recent population changes reflect longer-term trends. During the COVID-19 pandemic, many of the counties that saw the strongest population increases were located in high-growth states like Florida and Texas.

Below are the 20 counties that grew the most from 2020 to 2021.

RankCountyPoint of ReferenceStatePop. Growth (2020–2021)
#1Maricopa CountyPhoenixArizona+58,246
#2Collin CountyPlanoTexas+36,313
#3Riverside CountyRiverside, Palm SpringsCalifornia+35,631
#4Fort Bend CountySugar LandTexas+29,895
#5Williamson CountyGeorgetownTexas+27,760
#6Denton CountyDentonTexas+27,747
#7Polk CountyLakelandFlorida+24,287
#8Montgomery CountyThe WoodlandsTexas+23,948
#9Lee CountyFort MyersFlorida+23,297
#10Utah CountyProvoUtah+21,843
#11Pinal CountySan Tan ValleyArizona+19,974
#12Clark CountyLas VegasNevada+19,090
#13Pasco CountyNew Port RicheyFlorida+18,322
#14Wake CountyRaleighNorth Carolina+16,651
#15St. Johns CountySt. AugustineFlorida+15,550
#16Hillsborough CountyTampaFlorida+14,814
#17Bexar CountySan AntonioTexas+14,184
#18Ada CountyBoiseIdaho+13,947
#19Osceola CountyKissimmeeFlorida+12,427
#20St. Lucie CountyFort PierceFlorida+12,304

Many of these counties are located next to large cities, reflecting a shift to the suburbs and larger living spaces. However, as COVID-19 restrictions ease, and the pandemic housing boom tapers off due to rising interest rates, it remains to be seen whether the suburban shift will continue, or if people begin to migrate back to city centers.

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