Eureka, South Dakota

Eureka is a city in western McPherson County, South Dakota, United States, near the North Dakota state line. The population was 813 at the 2020 census.

Eureka
City of Eureka
Location in McPherson County and the state of South Dakota
Coordinates: 45°46′15″N 99°37′14″W
CountryUnited States
StateSouth Dakota
CountyMcPherson
PlattedOctober 3, 1887
Incorporated1892
Government
  MayorDennis Heilman
Area
  Total1.00 sq mi (2.59 km2)
  Land0.93 sq mi (2.42 km2)
  Water0.07 sq mi (0.17 km2)
Elevation
1,887 ft (575 m)
Population
 (2020)
  Total813
  Estimate 
(2022)
794
  Density871.38/sq mi (336.45/km2)
Time zoneUTC-6 (Central (CST))
  Summer (DST)UTC-5 (CDT)
ZIP code
57437
Area code605
FIPS code46-20180
GNIS feature ID1267384
Websiteeurekasd.com
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