Lake St. Clair is an unincorporated community and census-designated place (CDP) in Franklin County, Missouri, United States. It is in the southeast part of the county, surrounding a lake impounded on a tributary of Hoosier Creek, a south-flowing tributary of the Meramec River. The community is bordered to the north by the city of Saint Clair and is 54 miles (87 km) southwest of St. Louis.

Lake St. Clair, Missouri
Census-designated place
Lake St. Clair Show map of Missouri Lake St. Clair Show map of the United States
Coordinates: 38°19′22″N 90°59′52″W
Country	United States
State	Missouri
County	Franklin
Township	Central
Area [1]
• Total	0.84 sq mi (2.17 km2)
• Land	0.72 sq mi (1.87 km2)
• Water	0.12 sq mi (0.30 km2)
Elevation [2]	700 ft (200 m)
Population  (2020)
• Total	825
• Density	1,139.50/sq mi (440.10/km2)
Time zone	UTC-6 (Central (CST))
• Summer (DST)	UTC-5 (CDT)
ZIP Code	63077 (Saint Clair)
Area code	636
FIPS code	29-40039
GNIS feature ID	2806400[2]

Lake St. Clair was first listed as a CDP prior to the 2020 census.[2]

Demographics

References

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