Auto · County · Missouri
Auto repair and car care businesses in St. Clair County, MO
How St. Clair County, MO compares with other counties and the U.S. for auto repair and car care businesses: competitors, household spending, official counts and growth.
Groundwork market score
Not scored
Counties under 10,000 people aren’t scored, since a few businesses can swing their figures.
- Listings
- 15
- 3 chain locations (20%)
- Official establishments
- 4
- Businesses with payroll, 2023
- Household spending a year
- $4.7M
- On vehicle maintenance and repairs · $1,156 a household
- Spending per listing
- $314K
- 17% above the U.S.
- Listings per 10k households
- 36.8
- 3% above the U.S.
- Population, 2025
- 9,976
- +6.7% since 2020
See the auto repair and car care businesses around any address in St. Clair County
The site report maps the auto repair and car care businesses 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 $4.7M a year on vehicle maintenance and repairs, or $1,156 per household, 21% above the U.S. average. That is about $314K of household spending for each business on map listings, 17% above the U.S. figure of $269K.
There are 15 auto repair and car care businesses on map listings in St. Clair County as of September 2026. Chain locations make up 20% of them, against 24% across the U.S. That comes to 36.8 for every 10,000 households, 3% above the U.S. rate of 35.7.
The official count of businesses with payroll classed as automotive repair and maintenance, and tire dealers in St. Clair County was 4 in 2023. That is one for every 1,018 households, against one for every 681 across the U.S. Official counts list 29 one-person businesses without payroll.
Population estimates put the population change in St. Clair County from 2020 to 2025 at +6.7%, faster than the U.S. (+3.1%). Counties under 10,000 people aren’t given a market score, since a few businesses can swing their figures.
How St. Clair County compares
The same measures for Missouri and the whole U.S. Spending per listing divides a year of household spending on all vehicle maintenance and repairs by the auto repair and car care businesses 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 | Missouri | U.S. |
|---|---|---|---|
| Listings per 10k households | 36.8 | 37.9 | 35.7 |
| Spending per listing | $314K | $279K | $269K |
| Households per official establishment | 1,018 | 613 | 681 |
| Official establishment growth, 2019–2023 | n/a | +2.8% | +4.1% |
| Population growth, 2020–2025 | +6.7% | +1.9% | +3.1% |
| Spending per household on vehicle maintenance and repairs | $1,156 | $1,058 | $958 |
| Median household income | $53,043 | $70,702 | $80,734 |
| Groundwork market score | Not scored | 42 |
Official counts and lending
Businesses
- Official establishments, 2019 to 2023
- 6 → 4
- Employees, 2023
- 14
- Annual payroll, 2023
- $727K
- One-person businesses, 2023
- 29Businesses with no payroll
- Map listings, September 2026
- 153 chain locations
- Listings at the U.S. rate for this spending
- 18The U.S. ratio of listings to household spending, applied here
SBA-backed loans since fiscal 2022
- Loans
- 0
- Amount
- $0
SBA-backed loans to businesses classed as automotive repair and maintenance, and tire dealers 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
- 9,976+6.7% since 2020
- Households
- 4,071
- Median age
- 43.7
- Homes lived in by their owners
- 76%
- Vehicles per household
- 2.1
- Land area
- 675 sq. mi.
- People per square mile
- 14
- Median household income
- $53,043
- Average household income
- $69,413
- Median home value
- $157,100
- Jobs located here
- 1,613
- Daytime population
- 7,601Residents 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 and car care businesses 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 and car care across Missouri
Every Missouri market ranked →The highest-scoring counties in Missouri for auto repair and car care businesses, numbered among those based in Missouri, with St. Clair County marked.
Top counties in Missouri
| Market | Score | Listings | Per 10k households | Spending per listing | Population growth | U.S. rank |
|---|---|---|---|---|---|---|
| 1Platte County, MO | 88 | 111 | 25.3 | $465K | +6.7% | #29 of 2,401 |
| 2Warren County, MO | 84 | 52 | 37.6 | $343K | +9.2% | #67 of 2,401 |
| 3Johnson County, MO | 80 | 71 | 33.7 | $340K | +4.9% | #129 of 2,401 |
| 4Stone County, MO | 76 | 42 | 31.0 | $357K | +4.1% | #203 of 2,401 |
| 5Osage County, MO | 74 | 15 | 28.4 | $477K | +2.7% | #241 of 2,401 |
| 6Cass County, MO | 74 | 163 | 37.7 | $331K | +7.1% | #256 of 2,401 |
| 7Andrew County, MO | 73 | 24 | 34.3 | $359K | +0.7% | #272 of 2,401 |
| 8Boone County, MO | 73 | 244 | 31.9 | $334K | +4.2% | #279 of 2,401 |
| 9St. Charles County, MO | 72 | 564 | 35.0 | $343K | +4.9% | #302 of 2,401 |
| 10Clay County, MO | 69 | 321 | 31.4 | $353K | +4.3% | #382 of 2,401 |
| St. Clair County, MO | Not scored | 15 | 36.8 | $314K | +6.7% |
Other business types in St. Clair County
None has a Groundwork market score here. Counties under 10,000 people aren’t scored, since a few businesses can swing their figures.
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 and car care businesses are in St. Clair County, MO?
As of September 2026, map listings count 15 auto repair and car care businesses in St. Clair County. 3 of them (20%) are chain locations. The listings count repair shops, body shops, tire shops, car washes, oil change and parts stores. Official counts show 4 businesses with payroll classed as automotive repair and maintenance, and tire dealers in 2023. Official counts also show 29 one-person businesses without payroll.
How much do households in St. Clair County, MO spend on vehicle maintenance and repairs?
About $4.7M a year, or $1,156 per household. That is 21% above the U.S. average (an index of 121, where 100 is the U.S. average). Spread across the 15 auto repair and car care businesses on map listings, it comes to $314K per business. It is estimated from the incomes of the 4,071 households in St. Clair County and national spending patterns by income.
How does St. Clair County, MO compare with the U.S. for auto repair and car care businesses?
St. Clair County has 36.8 auto repair and car care businesses per 10,000 households, 3% above the U.S. rate of 35.7. Spending per business is $314K, 17% above the U.S. figure of $269K. At the U.S. ratio of auto repair and car care businesses to household spending, St. Clair County would have about 18, against 15 on map listings. There is one business with payroll in the industry for every 1,018 households, against one for every 681 across the U.S.
How fast is St. Clair County, MO growing?
Population estimates put St. Clair County at 9,976 people in 2025, up 6.7% since 2020, faster than the U.S. (+3.1%). It has 4,071 households. The median household income in St. Clair County is $53,043 a year, 34% below the U.S. median of $80,734.
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. The score leaves out counties under 10,000 people, where a handful of businesses would swing it.
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 and car care businesses 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 and car care businesses · 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.