Auto · County · Missouri
Auto repair and car care businesses in St. Charles County, MO
The auto repair and car care businesses in St. Charles County, MO, the household spending behind them and how the market ranks against other counties.
Groundwork market score · out of 100
Score 72 out of 100: Upper middle
Ranked #302 of 2,401 scored counties
#9 of 85 scored counties in Missouri
- Listings
- 564
- 211 chain locations (37%)
- Official establishments
- 260
- −3.0% since 2019
- Household spending a year
- $193.4M
- On vehicle maintenance and repairs · $1,199 a household
- Spending per listing
- $343K
- 28% above the U.S.
- Listings per 10k households
- 35.0
- 2% below the U.S.
- Population, 2025
- 426,499
- +4.9% since 2020
See the auto repair and car care businesses around any address in St. Charles 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. Charles 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. Charles County spend about $193.4M a year on vehicle maintenance and repairs, or $1,199 per household, 25% above the U.S. average. That works out to $343K per business, 28% above the U.S. figure of $269K.
St. Charles County has 564 auto repair and car care businesses on map listings as of September 2026. 211 of them (37%) are chain locations, against 24% across the U.S. Per 10,000 households, that is 35.0, 2% below 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. Charles County was 260 in 2023, down 3.0% from 2019. That is one for every 620 households, against one for every 681 across the U.S. Another 229 one-person businesses have no payroll, by official counts. Since fiscal 2022, 13 SBA-backed loans worth $7.4M have gone to businesses classed as automotive repair and maintenance, and tire dealers in St. Charles County.
Population estimates put the population change in St. Charles County from 2020 to 2025 at +4.9%, faster than the U.S. (+3.1%). The Groundwork market score for auto repair and car care businesses in St. Charles County is 72 (upper middle), #302 of 2,401 scored counties and #9 of 85 scored counties in Missouri. That puts it in the top quarter of counties.
How St. Charles 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. Charles County | Missouri | U.S. |
|---|---|---|---|
| Listings per 10k households | 35.0 | 37.9 | 35.7 |
| Spending per listing | $343K | $279K | $269K |
| Households per official establishment | 620 | 613 | 681 |
| Official establishment growth, 2019–2023 | −3.0% | +2.8% | +4.1% |
| Population growth, 2020–2025 | +4.9% | +1.9% | +3.1% |
| Spending per household on vehicle maintenance and repairs | $1,199 | $1,058 | $958 |
| Median household income | $104,692 | $70,702 | $80,734 |
| Groundwork market score | 72 | 42 |
Official counts and lending
Businesses
- Official establishments, 2019 to 2023
- 268 → 260−3.0% over the period
- Employees, 2023
- 2,058
- Annual payroll, 2023
- $99.6M
- One-person businesses, 2023
- 229Businesses with no payroll
- Map listings, September 2026
- 564211 chain locations
- Listings at the U.S. rate for this spending
- 720The U.S. ratio of listings to household spending, applied here
SBA-backed loans since fiscal 2022
- Loans
- 13
- Amount
- $7.4M
SBA-backed loans to businesses classed as automotive repair and maintenance, and tire dealers in St. Charles 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. Charles County
- Population, 2025 estimate
- 426,499+4.9% since 2020
- Households
- 161,311
- Median age
- 40.8
- Homes lived in by their owners
- 81%
- Vehicles per household
- 2.0
- Land area
- 560 sq. mi.
- People per square mile
- 740
- Median household income
- $104,692+23.2% vs. 2015–2019, before inflation
- Average household income
- $129,305
- Median home value
- $320,800
- Jobs located here
- 167,185
- Daytime population
- 365,581Residents who don’t work, plus everyone whose job is here
Looking at a specific site in St. Charles 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. Charles 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. Charles 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 |
Other business types in St. Charles County
Each with its Groundwork market score here, out of 100, where it has one.
Food and drink
Groceries and convenience
Auto
- Auto repair and car care72
- Auto repair shops74
- Collision repair and body shops69
- Car washes and detailing65
- Tire shops83
- Oil change and quick lube50
- Gas stations81
- Insurance agencies28
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. Charles County, MO?
Map listings as of September 2026 show 564 auto repair and car care businesses in St. Charles County. 211 of them (37%) are chain locations. The listings count repair shops, body shops, tire shops, car washes, oil change and parts stores. Official counts show 260 businesses with payroll classed as automotive repair and maintenance, and tire dealers in 2023, down 3.0% from 2019. Official counts list 229 one-person businesses without payroll.
How much do households in St. Charles County, MO spend on vehicle maintenance and repairs?
About $193.4M a year, or $1,199 per household. That is 25% above the U.S. average (an index of 125, where 100 is the U.S. average). Spread across the 564 auto repair and car care businesses on map listings, it comes to $343K per business. It is estimated from the incomes of the 161,311 households in St. Charles County and national spending patterns by income.
How does St. Charles County, MO compare with the U.S. for auto repair and car care businesses?
St. Charles County has 35.0 auto repair and car care businesses per 10,000 households, 2% below the U.S. rate of 35.7. Spending per business is $343K, 28% above the U.S. figure of $269K. At the U.S. ratio of auto repair and car care businesses to household spending, St. Charles County would have about 720, against 564 on map listings. There is one business with payroll in the industry for every 620 households, against one for every 681 across the U.S. The official count fell 3.0% from 2019 to 2023, against +4.1% for the U.S.
How fast is St. Charles County, MO growing?
Population estimates put St. Charles County at 426,499 people in 2025, up 4.9% since 2020, faster than the U.S. (+3.1%). It has 161,311 households. The median household income in St. Charles County is $104,692 a year, 30% above the U.S. median of $80,734. That rose 23.2% from the 2015–2019 survey, 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. Charles County scores 72 for auto repair and car care businesses (upper middle), #302 of 2,401 scored counties.
How can I see the market around a specific site?
Run a Groundwork site report on an address in St. Charles 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. Charles County
Screening a site or an acquisition in St. Charles 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. Charles 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.