Marion County Flag

Marion County

State:
Indiana
County Seat:
Indianapolis

Marion County's estimated 2025 population is 966,934 with a growth rate of -0.08% in the past year according to the most recent United States census data. Marion County is the 1st largest county in Indiana. The 2010 population was 904,604 and has seen a growth of 6.89% since that time.

966,934
Total Population
2,442
Population Density (mi²)
1
Population Rank (State)
-763 -0.08%
Annual Population Growth

Marion County Population

Demographics

Economics and Income Statistics