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Start at Scan Check Protect →St. Clair County, Michigan
Check your St. Clair County registration.
Confirm what Michigan has on file first, then use St. Clair County's official election channels below.
About St. Clair County
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. 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. The county was created September 10, 1820, and its government was organized in 1821. 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. This area is sometimes dubbed the Blue Water Area.
Description adapted from Wikipedia, CC BY-SA 4.0.
At a glance
St. Clair County at a glance
- County seat
- Port Huron
- Population
- 160,383 (2020)
- Land area
- 837 sq mi
- Founded
- 1820
Communities
Largest communities in St. Clair County
- Port Huron county seat28,983
- Fort Gratiot11,242
- Port Huron Township10,792
- Marysville9,997
- Kimball Township9,609
Next door
Neighboring counties
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Ask St. Clair County directly
Your county election office handles registration, mail ballots, and polling places.
St. Clair County election office →Official channels
St. Clair County election resources
St. Clair County election office. Statewide tools and every Michigan resource in one place: the Michigan page at Scan Check Protect →
Part of Michigan Voter Check
This is the St. Clair County page of Michigan Voter Check, a project of True the Vote, pointing Michigan voters at the official tools that already exist — and at Scan Check Protect to verify your registration.
Where anything here differs from what St. Clair County or Michigan Secretary of State publishes, they are right and this page is not.