Lake Decatur

Lake Decatur
Lake Decatur Location within Illinois Lake Decatur Location within the United States
Location	Decatur, Illinois
Coordinates	39°49′N 88°56′W
Lake type	Reservoir
Primary inflows	north Upper Sangamon watershed
Primary outflows	Sangamon River
Catchment area	925 sq mi (2,396 km2)
Basin countries	United States
Surface area	4.2 sq mi (11 km2)
Average depth	7.9 ft (2.4 m)
Water volume	21,000 acre⋅ft (0.026 km3)
Shore length1	30 mi (48 km) (1922)
Surface elevation	613 ft (187 m)
1 Shore length is not a well-defined measure.

Lake Decatur is a 2,800-acre (11 km²) reservoir located in the city of Decatur, Illinois, USA, east of downtown. The city and lake both share the name of U.S. Navy Commodore Stephen Decatur. The lake is 613 feet (187 m) above sea level and has a watershed of 925 square miles (2,400 km²) or 592,000 acres (240,000 ha) reaching into parts of seven counties. The largest lake on the Sangamon River, it was created in 1920–1922.