Jefferson County Flag

Jefferson County

State:
Pennsylvania
County Seat:
Brookville

Jefferson County's estimated 2025 population is 43,109 with a growth rate of -0.59% in the past year according to the most recent United States census data. Jefferson County is the 49th largest county in Pennsylvania. The 2010 population was 45,163 and has seen a growth of -4.55% since that time.

43,109
Total Population
66
Population Density (mi²)
49
Population Rank (State)
-258 -0.59%
Annual Population Growth

Jefferson County Population

Demographics

Economics and Income Statistics

Sources

  1. City and Town Population Totals: 2020-2024
  2. US Census State Population Estimates - Most recent state estimates from the Census Bureau's Population Estimates Program
  3. US Census County Population Estimates - Most recent county estimates from the Census Bureau's Population Estimates Program
  4. American Community Survey (2009 - 2013)
  5. Census QuickFacts
  6. Historical Populations of States and Counties (1790 - 1990)