Auto · County · Michigan
Auto repair shops in St. Clair County, MI
How St. Clair County, MI compares with other counties and the U.S. for auto repair shops: competitors, household spending, official counts and growth.
Groundwork market score · out of 100
Score 64 out of 100: Upper middle
Ranked #565 of 2,378 scored counties
#17 of 74 scored counties in Michigan
- Listings
- 132
- 17 chain locations (13%)
- Official establishments
- 59
- +1.7% since 2019
- Household spending a year
- $72.6M
- On vehicle maintenance and repairs · $1,071 a household
- Spending per listing
- $550K
- 24% above the U.S.
- Listings per 10k households
- 19.5
- 9% below the U.S.
- Population, 2025
- 160,486
- +0.1% since 2020
See the auto repair shops around any address in St. Clair County
The site report maps the auto repair shops on map listings near the address, by name and distance, and sizes the households and spending around it. Or open the report at the center of St. Clair County. Signed out, you see a blurred preview; on an account, each report is one action.
Free10 actions over 3 days, no cardSurvey estimates 2020–2024 · population estimates 2025 · official business counts 2023 · map listings September 2026 · Data credits · How we measure
What this means
Household spending on vehicle maintenance and repairs in St. Clair County comes to about $72.6M a year: $1,071 per household, 12% above the U.S. average. That works out to $550K per shop, 24% above the U.S. figure of $445K. The spending figure covers all vehicle maintenance and repairs, not only auto repair shops.
There are 132 auto repair shops on map listings in St. Clair County as of September 2026. 17 of them (13%) are chain locations, against 16% across the U.S. That is 19.5 per 10,000 households, 9% below the U.S. rate of 21.5.
Official counts show 59 businesses with payroll classed as mechanical, body and glass repair in St. Clair County in 2023, up 1.7% from 2019. That is one for every 1,149 households, against one for every 955 across the U.S. Official counts list 167 one-person businesses without payroll. Since fiscal 2022, 4 SBA-backed loans worth $1.6M have gone to businesses classed as mechanical, body and glass repair in St. Clair County.
Population estimates show St. Clair County grew 0.1% from 2020 to 2025, slower than the U.S. (+3.1%). For auto repair shops, St. Clair County has a Groundwork market score of 64 (upper middle): #565 of 2,378 scored counties and #17 of 74 scored counties in Michigan. That puts it in the top quarter of counties.
How St. Clair County compares
The same measures for Michigan and the whole U.S. Spending per listing divides a year of household spending on all vehicle maintenance and repairs by the auto repair shops counted, so it measures the demand for each competitor, not any business’s revenue. Households per establishment does the same with the official count.
| Measure | St. Clair County | Michigan | U.S. |
|---|---|---|---|
| Listings per 10k households | 19.5 | 19.9 | 21.5 |
| Spending per listing | $550K | $512K | $445K |
| Households per official establishment | 1,149 | 960 | 955 |
| Official establishment growth, 2019–2023 | +1.7% | +1.2% | +2.1% |
| Population growth, 2020–2025 | +0.1% | +0.6% | +3.1% |
| Spending per household on vehicle maintenance and repairs | $1,071 | $1,022 | $958 |
| Median household income | $71,270 | $72,875 | $80,734 |
| Groundwork market score | 64 | 56 |
Official counts and lending
Businesses
- Official establishments, 2019 to 2023
- 58 → 59+1.7% over the period
- Employees, 2023
- 246
- Annual payroll, 2023
- $13.2M
- One-person businesses, 2023
- 167Businesses with no payroll
- Map listings, September 2026
- 13217 chain locations
- Listings at the U.S. rate for this spending
- 163The U.S. ratio of listings to household spending, applied here
SBA-backed loans since fiscal 2022
- Loans
- 4
- Amount
- $1.6M
SBA-backed loans to businesses classed as mechanical, body and glass repair in St. Clair County, through June 2026, placed by the borrower’s ZIP code. Official establishments are businesses with payroll; the official counts leave out places with fewer than 3.
Population and households in St. Clair County
- Population, 2025 estimate
- 160,486+0.1% since 2020
- Households
- 67,816
- Median age
- 44.6
- Homes lived in by their owners
- 81%
- Vehicles per household
- 1.8
- Land area
- 722 sq. mi.
- People per square mile
- 222
- Median household income
- $71,270+25.1% vs. 2015–2019, before inflation
- Average household income
- $90,621
- Median home value
- $224,600
- Jobs located here
- 41,623
- Daytime population
- 129,372Residents who don’t work, plus everyone whose job is here
Looking at a specific site in St. Clair County?
These figures cover the whole county. A site report draws rings around one address and counts what’s inside them: households, spending, jobs, and the auto repair shops on map listings by name and distance.
Or open the report at the center of St. Clair County. Signed out, you see a blurred preview; on an account, each report is one action.
Free10 actions over 3 days, no cardAuto repair shops across Michigan
Every Michigan market ranked →The highest-scoring counties in Michigan for auto repair shops, numbered among those based in Michigan, with St. Clair County marked.
Top counties in Michigan
| Market | Score | Listings | Per 10k households | Spending per listing | Population growth | U.S. rank |
|---|---|---|---|---|---|---|
| 1Leelanau County, MI | 90 | 11 | 11.4 | $1.1M | +3.0% | #18 of 2,378 |
| 2Lake County, MI | 82 | 5 | 9.6 | $971K | +9.1% | #75 of 2,378 |
| 3Benzie County, MI | 82 | 15 | 19.5 | $587K | +3.1% | #89 of 2,378 |
| 4Alcona County, MI | 78 | 5 | 9.4 | $1.1M | +3.7% | #140 of 2,378 |
| 5Livingston County, MI | 78 | 125 | 16.4 | $766K | +1.7% | #148 of 2,378 |
| 6Cass County, MI | 75 | 35 | 16.5 | $694K | +0.2% | #205 of 2,378 |
| 7Monroe County, MI | 74 | 97 | 15.4 | $729K | +0.7% | #224 of 2,378 |
| 8Washtenaw County, MI | 73 | 186 | 12.4 | $828K | −0.4% | #250 of 2,378 |
| 9Clinton County, MI | 72 | 59 | 18.6 | $643K | +1.6% | #286 of 2,378 |
| 10Crawford County, MI | 71 | 10 | 16.0 | $595K | +5.7% | #311 of 2,378 |
| 17St. Clair County, MI | 64 | 132 | 19.5 | $550K | +0.1% | #565 of 2,378 |
Other business types in St. Clair County
Each with its Groundwork market score here, out of 100, where it has one.
Food and drink
Groceries and convenience
Auto
Beauty and personal care
Fitness and classes
Health care
Child care
Clothing and laundry
Home services
Real estate
Funeral services
Questions
How many auto repair shops are in St. Clair County, MI?
As of September 2026, map listings count 132 auto repair shops in St. Clair County. 17 of them (13%) are chain locations. The listings count general, specialty, body and glass repair shops. Official counts show 59 businesses with payroll classed as mechanical, body and glass repair in 2023, up 1.7% from 2019. Official counts also show 167 one-person businesses without payroll.
How much do households in St. Clair County, MI spend on vehicle maintenance and repairs?
About $72.6M a year, or $1,071 per household. That is 12% above the U.S. average (an index of 112, where 100 is the U.S. average). Spread across the 132 auto repair shops on map listings, it comes to $550K per shop. That spending covers all vehicle maintenance and repairs, which auto repair shops share with other businesses in the trade. It is estimated from the incomes of the 67,816 households in St. Clair County and national spending patterns by income.
How does St. Clair County, MI compare with the U.S. for auto repair shops?
St. Clair County has 19.5 auto repair shops per 10,000 households, 9% below the U.S. rate of 21.5. Spending per shop is $550K, 24% above the U.S. figure of $445K. At the U.S. ratio of auto repair shops to household spending, St. Clair County would have about 163, against 132 on map listings. There is one business with payroll in the industry for every 1,149 households, against one for every 955 across the U.S. The official count rose 1.7% from 2019 to 2023, against +2.1% for the U.S.
How fast is St. Clair County, MI growing?
Population estimates put St. Clair County at 160,486 people in 2025, up 0.1% since 2020, slower than the U.S. (+3.1%). It has 67,816 households. Median household income in St. Clair County is $71,270, 12% below the U.S. median of $80,734. Against the 2015–2019 survey, the median rose 25.1%, before inflation.
What is the Groundwork market score?
The Groundwork market score runs from 0 to 100 and compares a market with others of its kind for one business type: states with states, metro areas with metro areas, small-town markets and counties with their own. It weighs household spending per competitor (35%), households per business with payroll (25%), population growth (20%) and spending power (20%), each ranked against those peers. A higher score means that, taken together, the market has more household spending and more households for each business already there, faster population growth and more spending per household than similar markets. It describes a market, not any one site or deal. St. Clair County scores 64 for auto repair shops (upper middle), #565 of 2,378 scored counties.
How can I see the market around a specific site?
Run a Groundwork site report on an address in St. Clair County. It maps the auto repair shops on map listings near the site and sizes the households and spending within the distance you choose. New accounts get 10 actions over 3 days, no card.
How the score works · Top markets for auto repair shops · All 56 business types in St. Clair County
Screening a site or an acquisition in St. Clair County?
A site report maps the competitors on map listings near an address and sizes the households and spending around it.
The button opens the report at the center of St. Clair County. Signed out, you see a blurred preview; on an account, each report is one action.
This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.
Figures are estimates for research only. Not investment or real estate advice.