Auto · County · Illinois
Auto repair shops in St. Clair County, IL
Competitor counts, household spending and official business counts for auto repair shops in St. Clair County, IL, set against other counties and the U.S.
Groundwork market score · out of 100
Score 50 out of 100: Upper middle
Ranked #1,170 of 2,378 scored counties
#39 of 87 scored counties in Illinois
- Listings
- 197
- 53 chain locations (27%)
- Official establishments
- 116
- −3.3% since 2019
- Household spending a year
- $104.1M
- On vehicle maintenance and repairs · $1,032 a household
- Spending per listing
- $528K
- 19% above the U.S.
- Listings per 10k households
- 19.5
- 9% below the U.S.
- Population, 2025
- 250,708
- −2.5% 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
Households in St. Clair County spend about $104.1M a year on vehicle maintenance and repairs, or $1,032 per household, 8% above the U.S. average. That is about $528K of household spending for each shop on map listings, 19% above the U.S. figure of $445K. The spending figure covers all vehicle maintenance and repairs, not only auto repair shops.
St. Clair County has 197 auto repair shops on map listings as of September 2026. 53 of them (27%) are chain locations, against 16% across the U.S. Per 10,000 households, that is 19.5, 9% below the U.S. rate of 21.5.
Official counts show 116 businesses with payroll classed as mechanical, body and glass repair in St. Clair County in 2023, down 3.3% from 2019. That is one for every 869 households, against one for every 955 across the U.S. Official counts also show 117 one-person businesses without payroll. Since fiscal 2022, 3 SBA-backed loans worth $3.3M have gone to businesses classed as mechanical, body and glass repair in St. Clair County.
Between 2020 and 2025, the population of St. Clair County declined 2.5%, against +3.1% for the U.S. St. Clair County scores 50 (upper middle) on the Groundwork market score for auto repair shops, ranking #1,170 of 2,378 scored counties and #39 of 87 scored counties in Illinois.
How St. Clair County compares
The same measures for Illinois 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 | Illinois | U.S. |
|---|---|---|---|
| Listings per 10k households | 19.5 | 20.3 | 21.5 |
| Spending per listing | $528K | $479K | $445K |
| Households per official establishment | 869 | 840 | 955 |
| Official establishment growth, 2019–2023 | −3.3% | −1.1% | +2.1% |
| Population growth, 2020–2025 | −2.5% | −0.6% | +3.1% |
| Spending per household on vehicle maintenance and repairs | $1,032 | $975 | $958 |
| Median household income | $73,854 | $83,390 | $80,734 |
| Groundwork market score | 50 | 38 |
Official counts and lending
Businesses
- Official establishments, 2019 to 2023
- 120 → 116−3.3% over the period
- Employees, 2023
- 625
- Annual payroll, 2023
- $36M
- One-person businesses, 2023
- 117Businesses with no payroll
- Map listings, September 2026
- 19753 chain locations
- Listings at the U.S. rate for this spending
- 234The U.S. ratio of listings to household spending, applied here
SBA-backed loans since fiscal 2022
- Loans
- 3
- Amount
- $3.3M
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
- 250,708−2.5% since 2020
- Households
- 100,846
- Median age
- 40.3
- Homes lived in by their owners
- 68%
- Vehicles per household
- 1.8
- Land area
- 658 sq. mi.
- People per square mile
- 386
- Median household income
- $73,854+33.8% vs. 2015–2019, before inflation
- Average household income
- $96,153
- Median home value
- $180,300
- Jobs located here
- 90,959
- Daytime population
- 229,240Residents 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 Illinois
Every Illinois market ranked →The highest-scoring counties in Illinois for auto repair shops, numbered among those based in Illinois, with St. Clair County marked.
Top counties in Illinois
| Market | Score | Listings | Per 10k households | Spending per listing | Population growth | U.S. rank |
|---|---|---|---|---|---|---|
| 1Kendall County, IL | 82 | 78 | 17.2 | $752K | +9.9% | #78 of 2,378 |
| 2Piatt County, IL | 76 | 9 | 13.0 | $994K | +0.6% | #182 of 2,378 |
| 3Woodford County, IL | 70 | 22 | 15.0 | $818K | −0.8% | #330 of 2,378 |
| 4Marshall County, IL | 70 | 8 | 15.7 | $743K | −2.0% | #332 of 2,378 |
| 5Boone County, IL | 69 | 40 | 20.6 | $583K | +0.4% | #375 of 2,378 |
| 6Menard County, IL | 68 | 8 | 15.3 | $725K | −3.3% | #401 of 2,378 |
| 7Crawford County, IL | 67 | 18 | 24.0 | $475K | +0.1% | #477 of 2,378 |
| 8Jersey County, IL | 65 | 16 | 20.1 | $599K | −1.5% | #517 of 2,378 |
| 9Greene County, IL | 64 | 8 | 18.0 | $648K | −5.1% | #550 of 2,378 |
| 10Douglas County, IL | 63 | 11 | 14.2 | $781K | +0.5% | #588 of 2,378 |
| 39St. Clair County, IL | 50 | 197 | 19.5 | $528K | −2.5% | #1,170 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, IL?
Map listings as of September 2026 show 197 auto repair shops in St. Clair County. 53 of them (27%) are chain locations. The listings count general, specialty, body and glass repair shops. Official counts show 116 businesses with payroll classed as mechanical, body and glass repair in 2023, down 3.3% from 2019. Another 117 one-person businesses have no payroll, by official counts.
How much do households in St. Clair County, IL spend on vehicle maintenance and repairs?
About $104.1M a year, or $1,032 per household. That is 8% above the U.S. average (an index of 108, where 100 is the U.S. average). Spread across the 197 auto repair shops on map listings, it comes to $528K 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 100,846 households in St. Clair County and national spending patterns by income.
How does St. Clair County, IL 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 $528K, 19% 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 234, against 197 on map listings. There is one business with payroll in the industry for every 869 households, against one for every 955 across the U.S. The official count fell 3.3% from 2019 to 2023, against +2.1% for the U.S.
How fast is St. Clair County, IL growing?
Population estimates put St. Clair County at 250,708 people in 2025, down 2.5% since 2020, against +3.1% for the U.S. It has 100,846 households. Median household income in St. Clair County is $73,854, 9% below the U.S. median of $80,734. Against the 2015–2019 survey, the median rose 33.8%, 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 50 for auto repair shops (upper middle), #1,170 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.