Elsewhere in Texas, most counties saw their populations either stagnate or decline over the last year. The state’s growth was almost entirely concentrated within the Texas Triangle between Houston and the Dallas-Fort Worth and Austin-San Antonio areas. 

Growth rates in suburban counties were also significantly higher than in their urban counterparts, which were more heavily affected by a massive reduction in immigration. The number of new residents in Harris County, for example, declined by more than 50% compared to 2024.

Harris County added more residents than any other county in the country last year, but the next five highest-gaining counties in Texas were all in the suburbs of major metropolitan areas, data shows. Dallas County even saw its population fall by several thousand people, as did other major urban counties across the United States. 

Take a look at the chart to see how Texas counties’ population changed in 2025.