St. Clair County is a county located in the western portion of the U.S. state of Missouri. As of the 2020 census, the population was 9,284. Its county seat is Osceola. The largest city is Appleton City. The county was organized in 1841 and named... Wikipedia
Cities: Osceola, Lowry City, Collins, and more
Population: 9,576 (2022)
Area: 702 mi²
Congressional district: 4th
Largest city: Appleton City
Named for: Arthur St. Clair
Seat: Osceola
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