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Ranked: The Most Populous Cities in the World

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Ranked: The Most Populous Cities in the World

More than half of the world’s population currently lives in cities—and as time goes on, it’s clear that more urban dwellers will find themselves living in megacities.

Megacities are defined as urban areas with a population of more than 10 million people. This means that the world’s top 20 most populous cities are all megacities.

This visualization, using data from Macrotrends, shows the 20 most populous cities in the world.

Rapid Urbanization

Today, more than 80% of people in higher income countries find themselves living in urban areas, and in upper-middle income countries the number lies between 50-80%.

Rural-to-urban migration is an increasingly relevant trend in the 21st century. Prospects of better job opportunities and higher wages, along with shifts from agrarian to industrial and service-based economies, are causing mass movement to cities.

How much have the world’s five most populous cities grown in just the last decade?

RankCity 2010 Population 2020 Population Percentage Change
#1🇯🇵 Tokyo36,834,00037,393,000+1.5%
#2🇮🇳 Delhi21,935,00030,291,000+38.1%
#3🇨🇳 Shanghai19,980,00027,058,000+35.4%
#4🇧🇷 São Paulo19,660,00022,043,000+12.1%
#5🇲🇽 Mexico City 20,132,00021,782,000+8.2%

While Tokyo only gained 559,000 people between 2010 and 2020, Delhi gained over 8 million people in the same time frame.

Shanghai grew by over 7 million people. Meanwhile, São Paulo grew by more than 2 million, and Mexico City gained just over 1.6 million people.

Interestingly, Mexico City placed third on the top largest cities list in 2010, but has since experienced slower growth compared to its competitors, Shanghai and São Paulo.

The Most Populous Cities Today

While Tokyo is the world’s most populous city with 37,393,000 people, this number is leveling out due to declining birth rates and an aging population.

Indian and Chinese cities, on the other hand, will continue to grow rapidly in the coming years. In fact, it’s expected that Delhi’s population could surpass Tokyo’s by 2028.

Here’s a closer look at the top 20 most populous cities.

RankCityPopulation
1🇯🇵 Tokyo37,393,000
2🇮🇳 Delhi30,291,000
3🇨🇳 Shanghai27,058,000
4🇧🇷 São Paulo22,043,000
5🇲🇽 Mexico City21,782,000
6🇧🇩 Dhaka21,006,000
7🇪🇬 Cairo20,901,000
8🇨🇳 Beijing20,463,000
9🇮🇳 Mumbai20,411,000
10🇯🇵 Osaka19,165,000
11🇺🇸 New York City18,804,000
12🇵🇰 Karachi16,094,000
13🇨🇳 Chongqing15,872,000
14🇹🇷 Istanbul15,190,000
15🇦🇷 Buenos Aires15,154,000
16🇮🇳 Kolkata14,850,000
17🇳🇬 Lagos14,368,000
18🇨🇩 Kinshasa14,342,000
19🇵🇭 Manila13,923,000
20🇨🇳 Tianjin13,580,000

By 2035, two new cities are expected to crack the top 20 list. Specifically, it’s projected that Bangalore (India) and Lahore (Pakistan) will boot out Tianjin and Buenos Aires. In addition, Guangzhou, Shenzhen, and Chennai are all expected to meet the megacity definition by 2035.

Urban growth will continue mainly in Asia and Africa, as some cities in regions such as Europe actually begin to shrink in population due to aging citizens and declining birth rates. Since 2012, deaths in the EU have actually been outpacing births—and in 2019, there were 4.7 million deaths compared to 4.2 million births, though net migration kept population numbers from falling.

Life in the City

While there are certainly downsides to mass urbanization, like pollution and overcrowding, the upsides clearly outweigh the negatives for most people. Convenience, better jobs, easier access to social services, and higher wages are among the many reasons people are likely to continue to move to cities, even in the post-COVID era.

With the emergence of smart and green cities, the quality of life for many urban dwellers will likely continue to improve, and more large urban areas will morph into megacities.

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Technology

Which U.S. Generation Wields the Most Cultural Power?

Visual Capitalist’s first-ever Generational Power Index looks at which U.S. generation holds the most cultural influence in American society.

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Which U.S. Generation Wields the Most Cultural Power?

This year, our team put together Visual Capitalist’s inaugural Generational Power Index (GPI), which looks at power dynamics across generations in America.

We considered three categories in our quest to quantify power: economics, political, and cultural. And while it turns out Baby Boomers dominate when it comes to economics and political factors—cultural influence is a different story.

Here’s a look at which U.S. generation holds the most cultural power, and how this power dynamic is expected to shift in the coming years.

Generations and Power, Defined

Before we get started, it’s important to clarify which generations we’ve included in our research, along with their age and birth year ranges.

GenerationAge range (years)Birth year range
The Silent Generation76 and over1928-1945
Baby Boomers57-751946-1964
Gen X41-561965-1980
Millennials25-401981-1996
Gen Z9-241997-2012
Gen Alpha8 and below2013-present

Using these age groups as a framework, we then calculated the Cultural Power category using these distinct equally-weighted variables:

cultural power category breakdown

With this methodology in mind, here’s how the Cultural Power category shakes out, using insights from the GPI.

Share of Cultural Power by Generation

Overall, we found that Gen X captures the largest share of cultural power, at 36%.

GenerationCultural Power Share
The Silent Generation8.8%
Baby Boomers25.1%
Gen X36.0%
Millennials23.9%
Gen Z6.1%
Gen Alpha0.00%
Total99.9%

*Note: figures may not add up to 100% due to rounding.

Gen X is particularly dominant in the film and TV industry, along with news media. For instance, over half of America’s largest news corporations have a Gen Xer as their CEO, and roughly 50% of Oscar winners in 2020 were members of Gen X.

Baby Boomers come in second place, capturing a 25% share of cultural power. They show particular dominance in traditional entertainment like books and art. For example, 42% of the authors on the NYT’s best-selling books list were Baby Boomers.

However, these older generations fall short in one critical category—digital platforms.

The Dominance of Digital

Why is digital so important when it comes to cultural power? Because digital media becoming increasingly more popular than traditional media sources (e.g. TV, radio).

GPI Cultural Power By Generation Supplemental Time Spent on Media

In 2020, Americans spent nearly 8 hours per day consuming digital media, nearly two hours more per day than they spent with traditional media.

This divide is expected to grow even further over the next few years. With younger generations dominating the digital space, Gen X may soon lose its place as the top dog of the culture category.

Celebrity 2.0: The Social Influencer

As audiences flock to online channels, advertisers have followed suit—and they’re willing to spend good money to gain access to their target demographics.

In fact, spend on influencer marketing has steadily increased in the last five years, and it’s expected to reach $13.8 billion by the end of 2021.

GPI Cultural Power By Generation Supplemental Influencer Marketing Spend

This shift to social media advertising is redefining the notion of celebrity, and who reaps the financial benefits of content creation. For instance, six-year-old Vlogger Like Nastya made an estimated $7.7 million per month from her YouTube channel in 2020. And keep in mind, this estimate is purely based on YouTube revenue—it doesn’t even include corporate partnerships and/or merchandise sales.

With all these shifts occurring, culture as we know it is at a crossroads. And as we continue to move towards a digital dominant society, those who hold power in traditional realms will either adapt or pass along the torch.

Download the Generational Power Report (.pdf)

The Generational Power Index

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Demographics

Timeline: Key Events in U.S. History that Defined Generations

This timeline, from our Generational Power Index report, explores defining events in U.S. history that impacted each generation.

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Key Events in U.S. History that Defined Generations

Looking back at history is a necessity when trying to understand what the future may hold.

Using insights from our Generational Power Index 2021 report, along with survey data from Pew Research in 2016, we identified some key milestones for each cohort, to understand how these events helped shape each generation’s unique perspectives.

Quick Context on Generational Definitions

Before diving in, it’s important to clarify which generations we’ve included in our research, along with their age and birth year ranges.

GenerationAge range (years)Birth year range
The Silent Generation76 and over1928-1945
Baby Boomers57-751946-1964
Gen X41-561965-1980
Millennials25-401981-1996
Gen Z9-241997-2012
Gen Alpha8 and below2013-present

These generational categories aren’t universal, but we went with the most widely cited definitions from reputable U.S. sources including the Pew Research and the U.S. Federal Reserve. It’s also worth noting that these generational definitions are somewhat specific to North America. For this reason, the focus is on U.S. historic events.

Defining Events: Silent Generation

The oldest members of the Silent Generation were 11 years old at the start of World War II, and were teenagers by the time it ended. In other words, their formative years fell smack dab in the middle of one of the biggest international conflicts in modern history.

Because of this, it makes sense that World War II ranks as the second most impactful event in their lifetimes, trailing only the far more recent Sept. 11 terrorist attacks (2001).

Most Impactful Historic Events, Silent Gen (Survey Results)

RankSilent GenSurvey %
#1Sept. 1159%
#2WWII44%
#3JFK Assassination41%
#4Vietnam War37%
#5Moon landing29%
#6Obama election28%
#7The tech revolution27%
#8Civil rights movement18%
#9Korean War18%
#10Iraq/Afghanistan wars14%

In fact, the Silent Generation cited four different wars on their list, more than any other cohort. For context, Boomers identified three conflicts (including the Cold War), while Millennials only referenced one (Iraq/Afghanistan).

Of course, other not-so-violent events made the list as well. And interestingly, some of these impressionable moments occurred later on in life.

For example, the youngest members of The Silent Generation were already in their mid-t0-late forties when cellphones became common in the ‘90s—yet, 27% identified the tech revolution as one of the top 10 most impactful events that happened in their lifetime.

Clearly, life never stops throwing you curve balls—no matter how far along you might be.

Most Notable Historical Events: Baby Boomers

Many of the historical experiences cited by Baby Boomers were related to war and violent acts. For instance, Boomers identified two assassinations on their list—John F. Kennedy’s in 1963, and Martin Luther King’s in 1968.

Most Impactful Historic Events, Boomers (Survey Results)

RankBaby BoomersSurvey %
#1Sept. 1170%
#2JFK Assassination45%
#3Vietnam War41%
#4Obama election38%
#5Moon landing35%
#6The tech revolution26%
#7Civil rights movement18%
#8Fall of Berlin Wall/end of Cold War16%
#9MLK assassination15%
#10Iraq/Afghanistan wars11%

For this generation, the moon landing in 1969 made the cut, as did Barack Obama’s election win in 2008.

Baby Boomers only identified one event that was unique to their cohort (Martin Luther King’s death). It’s worth noting that responses varied between Americans of different racial backgrounds. Not surprisingly, Black Americans were far more likely to name MLK’s death as a top defining moment.

Most Notable Historical Events: Gen X

For Gen Xers, two unique events made their list: the Challenger disaster (1986) and the Gulf War (1991). Interestingly, neither of of these events stood out for other generations.

The Challenger disaster impact was widely felt because it involved civilians alongside astronauts, making the space shuttle’s explosion all the more notorious.

Most Impactful Historic Events, Gen Xers (Survey Results)

RankGen XSurvey %
#1Sept. 1179%
#2Obama election40%
#3Fall of Berlin Wall/end of Cold War21%
#4The tech revolution20%
#5Iraq/Afghanistan wars18%
#6Gulf War15%
#7Challenger disaster14%
#8Gay marriage10%
#9Hurricane Katrina10%
#10Columbine shooting9%
#11Orlando shooting9%
#12Oklahoma City bombing9%

Hurricane Katrina (which occurred in 2005) is the only natural disaster to make it on any of these lists. The hurricane—which caused a significant share of New Orleans’ population to resettle—left a lasting impression on the nation.

Most Notable Historical Events: Millennials

Millennials remember the September 11 attacks the most of all generations, with 86% citing it as their most influential event. They also paid close attention to the aftermath of this occurrence, as marked by the inclusion of both the Iraq/Afghanistan wars and the death of Osama Bin Laden among their most notable events.

Most Impactful Historic Events, Millennials (Survey Results)

RankMillennialsSurvey %
#1Sept.1186%
#2Obama election47%
#3Iraq/Afghanistan wars24%
#4Gay marriage19%
#5The tech revolution18%
#6Orlando shooting17%
#7Hurricane Katrina11%
#8Columbine shooting10%
#9Bin Laden10%
#10Sandy Hook7%
#11Boston Marathon bombing7%
#12Great Recession7%

Sadly, a lot of Millennials recollect instances of gun violence more than any other generation, from Orlando and Columbine to Sandy Hook.

Last but not least, Millennials are the only generation to note the Global Financial Crisis of 2008, and the subsequent Great Recession, as a momentous event. This makes sense considering many of them began their careers in its aftermath.

Gen Z and Younger

The Pew Research survey data was collected in 2016, so opinions on more recent events have not been collected.

That said, it could be premature to say in the short term which events will leave a lasting impression on generations, young and old.

According to the above data, the election of Barack Obama was a lasting milestone in recent history. Will the election of Donald Trump leave a similar impact? How will COVID-19 be regarded in the future? Time will tell which events will define future generations.

Moments, Movements, and Everything in Between

One key takeaway worth emphasizing is just how varied these formative events can be. Some were experienced as a single moment, while others were a culmination of shifts over several years.

It’s also clear that timing and duration are not the only determining factors behind an event’s influence on American society. For example, the moon landing was a tangible moment with a date stamp, whereas the tech revolution has a much fuzzier start (before exploding in significance alongside the Dotcom boom and bust).

Also interesting is what is absent from the top results. For example, the Global Financial Crisis of 2008 is barely referenced.

In short, a variety of impactful events and more gradual revolutions have made their mark on American society. Some have influenced specific generations, while others have transcended generational boundaries and unified the American public.

Download the Generational Power Report (.pdf)

The Generational Power Index

For a full methodology of how we built the Generational Power Index, see pages 28-30 in the report PDF. This is the first year of the report, and any feedback is welcomed.

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