Why the South is the only U.S. region growing across every age group (washingtonpost.com) Why the South is the only U.S. region growing across every age group By Brady Dennis; Chris Hacker 2026062509011700 The young, the old, the middle aged. They all keep flocking south. Across every age group, the southeastern United States grew faster than any other region between April 1, 2020, and July 1, 2025, according to new data released Thursday by the Census Bureau.