Decatur, Indiana

Decatur, Indiana
Decatur downtown in 2006.
Location of Decatur in Adams County
Coordinates: 40°49′43″N 84°55′40″W / 40.82861°N 84.92778°W / 40.82861; -84.92778
Country United States
State Indiana
CountyAdams
TownshipsRoot, Washington
Founded1836
Incorporated1853
Named afterStephen Decatur
Government
  TypeMayor-council government
  MayorDan Rickord (D)
Area
  Total
6.11 sq mi (15.81 km2)
  Land6.10 sq mi (15.80 km2)
  Water0.01 sq mi (0.02 km2)
Elevation
801 ft (244 m)
Population
 (2020)
  Total
9,913
  Density1,625.08/sq mi (627.50/km2)
Time zoneUTC-5 (EST)
  Summer (DST)UTC-4 (EDT)
ZIP code
46733
Area code260
FIPS code18-17074
GNIS feature ID2394480
Websitewww.cityofdecatur.in.gov
Historical population
CensusPop.Note
1850231
1860532130.3%
187085861.3%
18801,905122.0%
18903,14264.9%
19004,14832.0%
19104,4717.8%
19204,7626.5%
19305,1568.3%
19405,86113.7%
19507,27124.1%
19608,32714.5%
19708,4451.4%
19808,6492.4%
19908,644−0.1%
20009,52810.2%
20109,405−1.3%
20209,9135.4%
US Decennial Census

Decatur is a city in Root and Washington townships, Adams County, Indiana, United States. It is the county seat (and the largest community) of Adams County. Decatur is home to Adams Memorial Hospital, which was designated as one of the "Top 100" Critical Access Hospitals in the United States. The population of Decatur was 9,913 at the 2020 census, up from 9,405 at the 2010 census.