New World Population Peak Forecasted: 10.1 Billion

The U.N.'s population division has increased their world population projection, previously set to peak at mid-century at 9 billion. Now they say it will continue growing to reach 10.1 billion by 2100, with Africa tripling its numbers.

1 minute read

May 5, 2011, 10:00 AM PDT

By Irvin Dawid


"The new report comes just ahead of a demographic milestone, with the world population expected to pass 7 billion in late October. Dr. Zlotnik, director of the United Nations population division said in an interview that the revised numbers were based on new forecasting methods and the latest demographic trends. But she cautioned that any forecast looking 90 years into the future comes with many caveats."

While Africa's population is expected to more than triple from 1 billion currently to 3.6 billion by 2100, the "United States population will rise from today's 311 million to 478 million by 2100." By comparison, "Nigeria, the most populous country in Africa...will rise from today's 162 million to 730 million by 2100."

And what of the world's most populous country?

"China, which has for decades enforced restrictive population policies, could soon enter the ranks of countries with declining populations, peaking at 1.4 billion in the next couple of decades, then falling to 941 million by 2100."

Wednesday, May 4, 2011 in The New York Times - World

"Planetizen federal action tracker" logo superimposed over black and white image of US Capitol dome.

Planetizen Federal Action Tracker

A weekly monitor of how Trump’s orders and actions are impacting planners and planning in America.

November 11, 2026 - Zachary Whalen

A road in north eastern Nebraska with power lines on either side, and grassy fields.

Eastern Nebraska is running out of electricity

Data centers and electrification are straining eastern Nebraska’s grid, throttling economic development.

November 6, 2026 - Grist

People walking and cycling on a street in Boston.

Study reveals best places in the U.S. for cycling, walking

New research from Streetlight Data examines bicycle and pedestrian miles per capita in the 100 largest U.S. cities by population.

November 8, 2026 - Smart Cities Dive

Mamdani speaks behind a podium in a navy suit.

DSA members accuse Mamdani of 'abandoning values' over housing redevelopment

New York City's mayor plans to replace about 2,000 units of public housing with private, mixed-income housing.

1 hour ago - Gothamist

Streetview of Colorado boulevard, a multi-lane road with trees on either side.

All sides of BRT debate unhappy with CDOT’s most recent move

The Colorado Department of Transportation is no longer considering center-running bus lanes for Colorado Boulevard.

2 hours ago - 9 News

Solar panels above a cranberry boy, with workers collecting berries.

Massachusetts bogs generate both power, and cranberries

Putting solar panels above farmland is one way Massachusetts is advancing toward its goal of net-zero carbon emissions by 2050.

3 hours ago - Grist

FREE Course: Walkable City 1: Why Walkability?

After describing his path towards focusing on walkability as the essence of good planning, Jeff Speck marches through his five principal reasons for making more walkable places.

Reinventing Malls: Planning Alchemy—Turning Gray Fields Into Gold

The course focuses on the opportunities and imperatives that shape reinvention of mall sites.