St. Clair County, MI

SAINT CLAIR COUNTY, situated on the boundary of Michigan with Lake Huron and St. Clair river on the east, and with Lake St. Clair on the south. Area, 930 square miles. Seat of justice, Saint Clair. Pop. in 1830, 1,114; in 1840, 4,606; in 1850, 10,420. (Fanning's, 1853)