Decatur Flag

Decatur

County:
Adams County
County Seat:
Yes
Area (mi²):
6.102
State:
Indiana

Decatur is a city located in Adams County, Indiana. Decatur has a 2026 population of 10,072. It is also the county seat of Adams County. Decatur is currently declining at a rate of -0.11% annually but its population has increased by 1.37% since the most recent census, which recorded a population of 9,936 in 2020.

10.1K
Total Population
1,651
Density (mi²)
-11 -0.11%
Growth

Nearby Cities

Sources

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