Census Bureau estimates released Thursday show midsize U.S. cities holding their own while national growth stalls. Municipalities of 25,000‑70,000 residents added roughly the same number of people as the country’s 342 million, outpacing the slowdown in larger metros. Fort Mill, South Carolina, led the pack, jumping 6.8 % to 38,673 residents.

Overall population rose by about 1.8 million between July 2024 and July 2025, a 0.5 % gain—the weakest pace since 2021. The dip reflects tighter border enforcement under the late‑Biden and Trump administrations and a record‑low fertility rate. Net immigration contributed 1.3 million newcomers, down sharply from 2.7 million the year before, prompting analysts to warn of further declines.

Housing construction kept pace, adding 1 % to the stock for a total of 148.3 million units in 2025, yet still lagging behind demand. California, Texas and Florida supplied the most new homes, a pattern that may benefit developers targeting growth corridors like Dallas‑Fort Worth and Austin, where several cities crossed the 500,000‑resident threshold.

Investors are watching the shift because midsize markets offer a “Goldilocks zone” of affordable housing, steady migration and lower cost pressures than megacities. The trend could reshape commercial real‑estate strategies, prompting banks and REITs to reallocate capital toward suburban office parks and multifamily projects where occupancy rates remain robust.