St. Clair County | |
|---|---|
 | |
 Seal | |
 Location within the U.S. state of Michigan | |
 Michigan's location within the U.S. | |
| Coordinates: 42°56′N 82°40′W / 42.93°N 82.67°W | |
| Country |  United States |
| State |  Michigan |
| Founded | March 28, 1820 (created) 1821 (organized)[1][2] |
| Named for | St. Clare of Assisi |
| Seat | Port Huron |
| Largest city | Port Huron |
| Area | |
• Total | 837 sq mi (2,170 km2) |
| • Land | 721 sq mi (1,870 km2) |
| • Water | 115 sq mi (300 km2) 14% |
| Population (2020) | |
• Total | 160,383  |
| • Density | 190/sq mi (70/km2) |
| Time zone | UTC−5 (Eastern) |
| • Summer (DST) | UTC−4 (EDT) |
| Area code | 810 |
| Congressional district | 9th |
| Website | www |
St. Clair County is a county located in the U.S. state of Michigan and bordering the west bank of the St. Clair River. As of the 2020 census, the population was 160,383.[3] It is the 13th-most populous county in the state. The county seat is Port Huron, located at the north end of the St. Clair River at Lake Huron.[1][4] The county was created September 10, 1820, and its government was organized in 1821.[1] It is located northeast of Detroit. It is considered by the State of Michigan to be a part of The Thumb, a peninsula that is surrounded by Lake Huron in the east-central area of the state.[5] This area is sometimes dubbed the Blue Water Area.[6]
- ^ a b c "Bibliography on St. Clair County". Clarke Historical Library, Central Michigan University. Retrieved January 29, 2013.
- ^ "St. Clair County", Michigan History MagazineArchived April 17, 2003, at the Wayback Machine
- ^ "QuickFacts: St. Clair County, Michigan". United States Census Bureau. Archived from the original on February 14, 2023. Retrieved September 15, 2021.
- ^ "Find a County". National Association of Counties. Retrieved June 7, 2011.
- ^ "State of Michigan Prosperity Regions" (PDF). Archived from the original (PDF) on June 13, 2022.
- ^ "Blue Water Area: Michigan's Thumbcoast Shoreline". January 3, 2017.