Eureka, South Dakota

Eureka
City of Eureka
Location in McPherson County and the state of South Dakota
Coordinates: 45°46′15″N 99°37′14″W / 45.77083°N 99.62056°W / 45.77083; -99.62056
CountryUnited States
StateSouth Dakota
CountyMcPherson
PlattedOctober 3, 1887
Incorporated1892
Government
 • MayorWendy Brockel
Area
 • Total
1.00 sq mi (2.59 km2)
 • Land0.93 sq mi (2.42 km2)
 • Water0.066 sq mi (0.17 km2)
Elevation
1,886 ft (575 m)
Population
 (2020)
 • Total
813
 • Estimate 
(2022)
794
 • Density871.4/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

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.