Eureka, South Dakota
city in McPherson County, South Dakota, United States / From Wikipedia, the free encyclopedia
Eureka is a city in McPherson County, South Dakota, United States. It is near the North Dakota state line. The population was 813 at the 2020 census.[1]
Eureka was laid out in 1887, and named "Eureka", a Greek word meaning "I have found it!"[2] Eureka is located at 45°46′9″N 99°37′19″W (45.769069, -99.621953).[3]