Eureka is a city located in St. Louis County, Missouri, United States between the cities of St. Louis and Pacific along Interstate 44. As of the 2010 census, the city had a population of 10,189. Since 1971, Eureka has been known as the home of the amusement park Six Flags St. Louis (formerly Six Flags Over Mid-America). Local news coverage for the town and some of its neighbors is provided by the Tri County Journal, the Eureka Pacific Current NewsMagazine, and the Washington Missourian. The city is 2 miles (3 km) west of the former Times Beach, the site of dioxin contamination in the 1980s; the area was depopulated, cleaned up, and reopened as Route 66 State Park.