Cohort Flow Explorer

Where did the children of every census since 1950 go? Each county is colored by its net migration residual: how its cohorts’ census counts ten years later compare with the count expected from national survival. Blue imports a cohort, red exports it. Click a county for its full cohort profile.

UnitExpected ActualRate

UnitExpected ActualRate
Click a county on the map (or search) to see how every birth cohort flowed through it — which ages it imports, which it exports, and how that changed decade by decade since the 1950s.