St. Clair County Map, Michigan

St. Clair County Map Collection
We allow you to use our St. Clair County map. Attribution is required.
St. Clair County, Michigan

St. Clair County is located in eastern Michigan, right along the shores of the Lake Huron and Lake St. Clair. It’s positioned just across from Canada, separated by St. Clair River.
It’s a place where freighters glide by and folks wave from their front porches. Port Huron is the county seat and is known as the Maritime Capital of the Great Lakes. And for good reason.
The Bluewater Bridge stretches across to Canada, a steel giant connecting two nations. People love the state parks and wildlife areas in this part of Michigan.
Category | Details |
---|---|
County Name | St. Clair County |
County Seat | Port Huron |
Population | Approximately 162,000 |
Cities, Towns, and Communities | Port Huron, St. Clair, Marysville, Marine City, Algonac, Capac, Yale, Richmond |
Interstates and Highways | I-69, I-94, M-19, M-25, M-29 |
FIPS Code | 26-147 |
Total Area (Land and Water) | 837 square miles (Land: 724 sq mi, Water: 113 sq mi) |
Adjacent Counties (and Direction) | Sanilac County (North), Lapeer County (West), Macomb County (South) |
Time Zone | Eastern Time Zone (ET) |
State | Michigan |
Coordinates | 42.9816° N, 82.5285° W |
Etymology | Named after the Lake St. Clair, which was named by French explorers on the feast day of Saint Clare |
Major Landmarks | Blue Water Bridge, Fort Gratiot Lighthouse, Algonac State Park, Pine Grove Park |
Website | St. Clair County Website |
PHYSICAL MAP
St. Clair County Topographic Map
St. Clair County is low and flat, especially near the water. Though small hills rise inland, the St. Clair River dominates the eastern edge. You can use our new zoom tool to explore every contour and highway in our map below.

TRANSPORTATION MAP
St. Clair County Road Map
St. Clair County has highways like I-69, I-94, M-29, and US-25. Even though border crossings can slow traffic near Canada, travel inside the county stays smooth.

SATELLITE IMAGERY
St. Clair County Satellite Map
The St. Clair River steals the show in our satellite map, which occupies the east side. Though urban areas cluster around Port Huron, farmland covers much of the western side.

OUTLINE MAP
St. Clair County Blank Map
St. Clair County hugs the St. Clair River, which forms its eastern border. Although the other sides are mostly straight, the river adds curves and bends. It also borders Canada across the river.

Neighboring Counties
Here are the 3 neighboring counties of St. Clair County: