Grant County Flag

Grant County

State:
Indiana
County Seat:
Marion

Grant County's estimated 2025 population is 66,614 with a growth rate of 0.31% in the past year according to the most recent United States census data. Grant County is the 26th largest county in Indiana. The 2010 population was 69,906 and has seen a growth of -4.71% since that time.

66,614
Total Population
161
Population Density (mi²)
26
Population Rank (State)
207 0.31%
Annual Population Growth

Grant County Population

Demographics

Economics and Income Statistics