The list
Workers who carpool, St. Clair County.
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1
Cottrellville 19.0%
St. Clair County, population 3,409
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2
Greenwood Township 16.1%
St. Clair County, population 1,502
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3
Port Huron 13.3%
St. Clair County, population 28,620
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4
Brockway Township 12.6%
St. Clair County, population 1,834
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5
Yale 11.8%
St. Clair County, population 2,129
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6
Port Huron Township 11.5%
St. Clair County, population 10,722
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7
Fort Gratiot 10.9%
St. Clair County, population 11,434
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8
Columbus Township 9.9%
St. Clair County, population 4,206
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9
Capac 9.4%
St. Clair County, population 1,970
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10
Grant Township 8.7%
St. Clair County, population 1,664
Numbers do not play favorites, and this list is no exception. Rebuild Detroit compared 30 communities in St. Clair County by workers who carpool for 2026.
Cottrellville comes first with 19.0%, 148% above the median. The St. Clair County median is 7.7%.
Who leads the list
Cottrellville leads the list with 19.0% (St. Clair County, population 3,409). Greenwood Township is second with 16.1% (St. Clair County, population 1,502).
Port Huron takes third with 13.3% (St. Clair County, population 28,620).
The rest of the top 10
Rounding out the top 10 are Brockway Township (12.6%), Yale (11.8%), Port Huron Township (11.5%), Fort Gratiot (10.9%), Columbus Township (9.9%), Capac (9.4%), and Grant Township (8.7%). Every one of the top 10 is in St. Clair County.
The other end of the list
At the other end of St. Clair County, Riley Township has the lowest figure with 1.6%. That is a spread of 17.4% between first and last place.
By the numbers
The gap between number 1 and number 2 is 2.9%. The top 10 average 12.3%, against 6.0% for the other 20 communities.
15 of the 30 communities sit above the median.
What it means for you
So what does that mean for you?
Carpooling splits the cost of the drive, which matters most where commutes run long. If you are choosing where to buy, rent or put down roots, start at the top of this list and read each place's own guide before you decide.
How we ranked
Every number is the U.S. Census Bureau, American Community Survey 2020-2024 5-year estimates. Communities with fewer than 1,000 residents are left out.
Ties are broken alphabetically.
Final word
This list updates when the numbers behind it do, and every place on it links to its own guide on Rebuild Detroit. That is the story so far.
Sources
Editor In Chief, Detroit Ledger
Victoria Jackson is a lifelong student and sharp-eyed documentarian of all things Detroit, from its rich musical roots and cultural icons to its shifting neighborhoods, storied architecture, and underground legends.