Union County Flag

Union County

State:
Pennsylvania
County Seat:
Lewisburg

Union County's estimated 2026 population is 42,003 with a growth rate of -0.19% in the past year according to the most recent United States census data. Union County is the 50th largest county in Pennsylvania. The 2010 population was 45,005 and has seen a growth of -6.67% since that time.

42,003
Total Population
133
Population Density (mi²)
50
Population Rank (State)
-78 -0.19%
Annual Population Growth

Union County Population

Demographics

Economics and Income Statistics