Dallas–Fort Worth added more people in two years than New York City did in sixty.

What changed

1890 to 1930

This is the era the rest of the page is measuring against. America still built houses in cities. New York City went from 2.5 million to 6.9 million — about 110,000 people a year, almost all of it in the five boroughs. San Francisco more than doubled. Factories, ports, and offices were in the city. So were the apartments. Subways and streetcars made density work. Immigrants came through Ellis Island and stayed. The 1920s were a building boom: walk-ups, then taller apartments, paid for privately, on lots the city already had.

Dallas–Fort Worth was still small. The 1890 metro on today’s county map is about 337,000 people. It was growing, but it was not where the country put its next million residents. That was New York, Chicago, Philadelphia, Detroit. The crash in 1929 ends the boom. The machine that added a New York every forty years stops.

1930 to 1950

New York still grew from 1930 to 1950. The break is after that. The Depression and the war stopped the old machine — walk-up apartments in the city — for about fifteen years. When building came back, the rules had changed.

The FHA (1934) and the GI Bill’s home loans (1944) made the thirty-year mortgage normal. Those programs preferred a new house on cheap land, not another building on a Brooklyn lot. Cars did the rest. Air conditioning made Dallas, Phoenix, and Orlando livable year-round. The first freeze is Depression plus a federal housing system built for suburbs.

1950 to 2010

This is the stall. New York City added 283,000 people in sixty years. San Francisco added 30,000. Dallas–Fort Worth added 5.2 million. Same length of time as 1890–1950; the people went somewhere else.

The interstates (1956) cut through the old cities and opened land at the edge. Urban renewal cleared blocks and often did not replace the housing. New York’s 1961 zoning cut how much the city was allowed to build. From the 1970s on, coastal suburbs and then the coastal cities themselves learned to say no — environmental rules, historic districts, local veto. California’s Proposition 13 in 1978 made each new house look like a fiscal loss to the town that approved it.

People left. New York fell from 7.89 million in 1950 to 7.07 million in 1980. San Francisco fell too. Crime rose, then later fell. Jobs and the middle class moved to the suburbs, then to Houston, Atlanta, Phoenix, and Dallas–Fort Worth. The Sun Belt still issued permits. That is why Las Vegas, Austin, and Orlando, turned on above, look like Dallas on the 1950 = 100 chart: they were allowed to exist.

New York starts climbing again after 1980. Immigration and a finance boom fill some of the hole. By 2010 it is only 283,000 above 1950. Sixty years of “recovery” barely got back to the starting line. Dallas–Fort Worth, in those same years, became a different country.

After 2010

The 2010 uptick is demand coming back, not a new building regime. New York bottomed in 1980. It was already climbing. 2000–2010 looks weak, and the 2010 census may have missed people. 2010–2020 then shows +629,000. Tech and other desk jobs piled into a few coastal cities. Crime had already fallen. Bloomberg-era rezonings and the 421-a permit rush put up towers in a few neighborhoods. Births and immigration did most of the population work.

San Francisco is the warning case. Tech demand exploded. Housing barely did. Population ticked up; prices did the growing. Then COVID. The 2025 estimates have New York and San Francisco below their 2020 peaks. Dallas–Fort Worth added about 1.2 million from 2010 to 2020 — two New York decades in one. People still want the old cities when the jobs are there. The permits are still in the Dallas suburbs.

Canada, Europe, Asia

The American split — old cities freeze, Sun Belt metros sprawl — is not the only pattern. Other rich places hit the same postwar moment and chose differently.

Canada

Toronto is the closest cousin to Dallas–Fort Worth in a cold climate. The metro went from about 1.1 million in 1951 to 6.2 million in 2021. Vancouver did the same on a smaller scale. A lot of that growth is suburbs — Mississauga, Brampton, Surrey — plus immigration. The difference is the cores also kept adding towers. The problem now is speed: Canada has been adding people faster than houses, so Toronto and Vancouver got expensive the San Francisco way even while they grew the Dallas way.

Europe

London is New York’s twin. Greater London peaked at 8.6 million in 1939, fell to 6.6 million in 1981, and was back to 8.8 million in 2021. Paris the city shrank — 2.85 million in 1954, about 2.1 million now — while the region around it doubled. Europe suburbanized too, with green belts and new towns, but it did not empty the old cores the way Detroit or 1970s New York did. They still live in the city. They also still make it hard to add a lot of housing in the center, so prices look like San Francisco’s even when the population chart looks healthier.

Asia

East Asia kept building cities. Tokyo’s metro is about 37 million because Japan treats housing as something you replace, not a neighborhood veto. Seoul went from a war-ruined city to a 25-million-person metro. Singapore housed a nation with public towers. China moved hundreds of millions of people into new apartments after 1980 — Dallas-scale building, many times over. The lesson is not that Asia is cheap. Tokyo and Seoul have their own costs. It is that when a country still issues permits in the city, the population chart does not go flat in 1950.