U.S. Child Population Declines Except in the South

According to data from the U.S. Census Bureau, America's child population decreased by 1.8 million from 2020 to 2025, with the under-18 population declining in all regions except the South. The South saw an increase of 303,969 children during this period. The overall population in the South grew by 6%, nearly double the national growth rate of 3.1%. The growth in the South is attributed to strong migration patterns, including families in prime childbearing years and retirees. Southern metro counties contributed significantly to the child population growth, adding 361,757 residents under 18, while rural areas experienced declines. Nationally, the median age rose to 39.4 in July 2025, with the population aged 65 and older increasing by 16.2% from 2020 to 2025, while the under-18 population fell by 2.4%. The data suggests that the South's growth could enhance the political and economic influence of Black and Latino families, contingent on equitable investments in community resources.