Auto · County · Missouri
Gas stations in St. Charles County, MO
How St. Charles County, MO compares with other counties and the U.S. for gas stations: competitors, household spending, official counts and growth.
Groundwork market score · out of 100
Score 81 out of 100: High
Ranked #129 of 2,358 scored counties
#1 of 83 scored counties in Missouri
- Listings
- 126
- 123 chain locations (98%)
- Official establishments
- 114
- −0.9% since 2019
- Household spending a year
- $472.1M
- On gasoline and other fuels · $2,927 a household
- Spending per listing
- $3.7M
- 57% above the U.S.
- Listings per 10k households
- 7.8
- 28% below the U.S.
- Population, 2025
- 426,499
- +4.9% since 2020
See the gas stations around any address in St. Charles County
The site report maps the gas stations 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
The Groundwork market score for gas stations in St. Charles County is 81 (high), #129 of 2,358 scored counties and #1 of 83 scored counties in Missouri. That puts it in the top 10% of counties for gas stations.
As of September 2026, map listings count 126 gas stations in St. Charles County. Chain locations make up 98% of them, against 84% across the U.S. That comes to 7.8 for every 10,000 households, 28% below the U.S. rate of 10.9.
Households in St. Charles County spend about $472.1M a year on gasoline and other fuels, or $2,927 per household, 13% above the U.S. average. That is about $3.7M of household spending for each station on map listings, 57% above the U.S. figure of $2.4M.
The official count of businesses with payroll classed as gasoline stations in St. Charles County was 114 in 2023, down 0.9% from 2019. That is one for every 1,415 households, against one for every 1,184 across the U.S. Since fiscal 2022, 1 SBA-backed loan worth $1.6M has gone to businesses classed as gasoline stations 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%).
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 gasoline and other fuels by the gas stations 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 | 7.8 | 13.4 | 10.9 |
| Spending per listing | $3.7M | $2M | $2.4M |
| Households per official establishment | 1,415 | 952 | 1,184 |
| Official establishment growth, 2019–2023 | −0.9% | +0.4% | −3.1% |
| Population growth, 2020–2025 | +4.9% | +1.9% | +3.1% |
| Spending per household on gasoline and other fuels | $2,927 | $2,681 | $2,595 |
| Median household income | $104,692 | $70,702 | $80,734 |
| Groundwork market score | 81 | 39 |
Official counts and lending
Businesses
- Official establishments, 2019 to 2023
- 115 → 114−0.9% over the period
- Employees, 2023
- 1,601
- Annual payroll, 2023
- $49.1M
- One-person businesses, 2023
- 6Businesses with no payroll
- Map listings, September 2026
- 126123 chain locations
- Listings at the U.S. rate for this spending
- 198The U.S. ratio of listings to household spending, applied here
SBA-backed loans since fiscal 2022
- Loans
- 1
- Amount
- $1.6M
SBA-backed loans to businesses classed as gasoline stations 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 gas stations 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 cardGas stations across Missouri
Every Missouri market ranked →The highest-scoring counties in Missouri for gas stations, 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 |
|---|---|---|---|---|---|---|
| 1St. Charles County, MO | 81 | 126 | 7.8 | $3.7M | +4.9% | #129 of 2,358 |
| 2Christian County, MO | 81 | 29 | 8.3 | $3.7M | +8.3% | #130 of 2,358 |
| 3Platte County, MO | 77 | 40 | 9.1 | $3.2M | +6.7% | #215 of 2,358 |
| 4Clay County, MO | 74 | 95 | 9.3 | $3M | +4.3% | #297 of 2,358 |
| 5Warren County, MO | 74 | 20 | 14.4 | $2.2M | +9.2% | #308 of 2,358 |
| 6Boone County, MO | 70 | 60 | 7.8 | $3.4M | +4.2% | #397 of 2,358 |
| 7Jefferson County, MO | 67 | 115 | 13.0 | $2.3M | +2.7% | #493 of 2,358 |
| 8Cass County, MO | 67 | 63 | 14.6 | $2.1M | +7.1% | #496 of 2,358 |
| 9Johnson County, MO | 66 | 29 | 13.8 | $2.1M | +4.9% | #536 of 2,358 |
| 10Webster County, MO | 65 | 19 | 13.6 | $2.2M | +10.4% | #571 of 2,358 |
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
Beauty and personal care
Fitness and classes
Health care
Child care
Clothing and laundry
Home services
Real estate
Funeral services
Questions
How many gas stations are in St. Charles County, MO?
St. Charles County has 126 gas stations on map listings as of September 2026. 123 of them (98%) are chain locations. The listings count gas stations. Official counts show 114 businesses with payroll classed as gasoline stations in 2023, down 0.9% from 2019. Official counts also show 6 one-person businesses without payroll.
How much do households in St. Charles County, MO spend on gasoline and other fuels?
About $472.1M a year, or $2,927 per household. That is 13% above the U.S. average (an index of 113, where 100 is the U.S. average). Spread across the 126 gas stations on map listings, it comes to $3.7M per station. 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 gas stations?
St. Charles County has 7.8 gas stations per 10,000 households, 28% below the U.S. rate of 10.9. Spending per station is $3.7M, 57% above the U.S. figure of $2.4M. At the national ratio of gas stations to household spending, St. Charles County would have about 198, against 126 on map listings. There is one business with payroll in the industry for every 1,415 households, against one for every 1,184 across the U.S. The official count fell 0.9% from 2019 to 2023, against −3.1% 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 81 for gas stations (high), #129 of 2,358 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 gas stations 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 gas stations · 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.