| Capital: | Port Huron |
|---|---|
| Origen y Formación del condado: | From part of Macomb County. |
| Población: | 163,040 habitantes |
| Área: | 837 sq mi |
| Localización del condado dentro de Michigan: |
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Localidades en St. Clair, Michigan
- Algonac
- Allenton
- Anchorville
- Avoca
- Brockway Township
- Burtchville Township
- Capac
- Casco Township St Clair County
- China Township
- Clay Township
- Columbus Township St Clair County
- Cottrellville Township
- East China Township
- Emmett
- Emmett Township St Clair County
- Fort Gratiot Township
- Goodells
- Grant Township
- Greenwood Township St Clair County
- Harsens Island
- Jeddo
- Lynn Township
- Marine City
- Marysville
- Memphis
- Mussey Township
- North Street
- Pearl Beach
- Port Huron Township
- Port Huron
- Richmond
- Riley Township St Clair County
- Saint Clair
- Smiths Creek
- St Clair Township
- Yale