Eureka, Missouri

38°30′10″N 90°38′42″W / 38.502736°N 90.645075°W / 38.502736; -90.645075

Eureka, Missouri
City
Eureka's main street
Location of Eureka, Missouri
Interactive map outlining Eureka
Coordinates: 38°30′10″N 90°38′42″W / 38.50278°N 90.64500°W / 38.50278; -90.64500
CityEureka
StateMissouri
CountiesSt. Louis, Jefferson
Government
  MayorSean Flower
Area
  Total
11.22 sq mi (29.06 km2)
  Land11.05 sq mi (28.62 km2)
  Water0.17 sq mi (0.44 km2)
Elevation
476 ft (145 m)
Population
 (2020)
  Total
11,646
  Density1,053.75/sq mi (406.85/km2)
Time zoneUTC−6 (Central (CST))
  Summer (DST)UTC−5 (CDT)
ZIP code
63025
Area code636
FIPS code29-22834
GNIS feature ID2394707
WebsiteCity of Eureka official website

Eureka is a city mainly in St. Louis County, with a small portion in Jefferson County, Missouri, adjacent to Wildwood and Pacific. It is in the extreme southwest of the Greater St. Louis metro area. As of the 2020 census, the city had a population of 11,646. Since 1971, Eureka has been known as the home of the amusement park Six Flags St. Louis.