Decatur, Indiana

Not to be confused with Decatur County, Indiana.

Decatur, Indiana
City
Decatur downtown in 2006.
Flag Logo
Location of Decatur in Adams County
Coordinates: 40°49′43″N 84°55′40″W
Country	United States
State	Indiana
County	Adams
Townships	Root, Washington
Founded	1836
Incorporated	1853
Named for	Stephen Decatur
Government
• Type	Mayor-council government
• Mayor	Dan Rickord (D)
Area
• Total	6.10 sq mi (15.81 km2)
• Land	6.10 sq mi (15.80 km2)
• Water	0.0077 sq mi (0.02 km2)
Elevation	801 ft (244 m)
Population  (2020)
• Total	9,913
• Density	1,625/sq mi (627.5/km2)
Time zone	UTC-5 (EST)
• Summer (DST)	UTC-4 (EDT)
ZIP code	46733
Area code	260
FIPS code	18-17074
GNIS feature ID	2394480
Website	www.cityofdecatur.in.gov

Historical population

Census	Pop.	Note	%±
1850	231		—
1860	532		130.3%
1870	858		61.3%
1880	1,905		122.0%
1890	3,142		64.9%
1900	4,148		32.0%
1910	4,471		7.8%
1920	4,762		6.5%
1930	5,156		8.3%
1940	5,861		13.7%
1950	7,271		24.1%
1960	8,327		14.5%
1970	8,445		1.4%
1980	8,649		2.4%
1990	8,644		−0.1%
2000	9,528		10.2%
2010	9,405		−1.3%
2020	9,913		5.4%
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.