Fitness and classes · County · Missouri
Gyms in St. Charles County, MO
How St. Charles County, MO compares with other counties and the U.S. for gyms: competitors, household spending, official counts and growth.
Groundwork market score · out of 100
Score 64 out of 100: Upper middle
Ranked #399 of 1,792 scored counties
#10 of 48 scored counties in Missouri
- Listings
- 144
- 41 chain locations (28%)
- Official establishments
- 65
- All fitness and recreational sports centers · +54.8% since 2019
- Household spending a year
- $195.2M
- On memberships, classes and admissions · $1,210 a household
- Spending per listing
- $1.4M
- 4% above the U.S.
- Listings per 10k households
- 8.9
- 17% above the U.S.
- Population, 2025
- 426,499
- +4.9% since 2020
See the gyms around any address in St. Charles County
The site report maps the gyms 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
As of September 2026, map listings count 144 gyms in St. Charles County. Of those, 41 are chain locations, or 28%, against 28% across the U.S. Per 10,000 households, that is 8.9, 17% above the U.S. rate of 7.6.
At $1,210 per household (23% above the U.S. average), households in St. Charles County spend about $195.2M a year on memberships, classes and admissions. That is about $1.4M of household spending for each gym on map listings, 4% above the U.S. figure of $1.3M. That spending covers all memberships, classes and admissions, which gyms share with other businesses in the trade.
In 2023, official counts showed 65 businesses with payroll in St. Charles County classed as fitness and recreational sports centers, up 54.8% from 2019. That is one for every 2,482 households, against one for every 3,109 across the U.S. The official count takes in all fitness and recreational sports centers, not only gyms: yoga, Pilates and fitness studios are counted too. Since fiscal 2022, 12 SBA-backed loans worth $2.2M have gone to businesses classed as fitness and recreational sports centers in St. Charles County.
Population estimates show St. Charles County grew 4.9% from 2020 to 2025, faster than the U.S. (+3.1%). St. Charles County scores 64 (upper middle) on the Groundwork market score for gyms, ranking #399 of 1,792 scored counties and #10 of 48 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 memberships, classes and admissions by the gyms 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 | 8.9 | 7.0 | 7.6 |
| Spending per listing | $1.4M | $1.2M | $1.3M |
| Households per official establishment (all fitness and recreational sports centers) | 2,482 | 3,599 | 3,109 |
| Official establishment growth, 2019–2023 | +54.8% | +11.3% | +5.8% |
| Population growth, 2020–2025 | +4.9% | +1.9% | +3.1% |
| Spending per household on memberships, classes and admissions | $1,210 | $869 | $983 |
| Median household income | $104,692 | $70,702 | $80,734 |
| Groundwork market score | 64 | 50 |
Official counts and lending
Businesses
- Official establishments, 2019 to 2023
- 42 → 65All fitness and recreational sports centers · +54.8% over the period
- Employees, 2023
- 1,084
- Annual payroll, 2023
- $15.3M
- One-person businesses, 2023
- Not publishedNot published for this business type
- Map listings, September 2026
- 14441 chain locations
- Listings at the U.S. rate for this spending
- 150The U.S. ratio of listings to household spending, applied here
SBA-backed loans since fiscal 2022
- Loans
- 12
- Amount
- $2.2M
SBA-backed loans to businesses classed as fitness and recreational sports centers 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. These official figures cover all fitness and recreational sports centers, not only gyms.
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 gyms 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 cardGyms across Missouri
Every Missouri market ranked →The highest-scoring counties in Missouri for gyms, 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 |
|---|---|---|---|---|---|---|
| 1Warren County, MO | 90 | 5 | 3.6 | $2.6M | +9.2% | #10 of 1,792 |
| 2Lincoln County, MO | 90 | 12 | 5.3 | $1.8M | +11.4% | #15 of 1,792 |
| 3Cass County, MO | 87 | 25 | 5.8 | $1.7M | +7.1% | #27 of 1,792 |
| 4Jefferson County, MO | 80 | 51 | 5.8 | $1.6M | +2.7% | #70 of 1,792 |
| 5Callaway County, MO | 77 | 6 | 3.6 | $2.2M | +3.2% | #97 of 1,792 |
| 6Newton County, MO | 76 | 12 | 5.4 | $1.4M | +6.1% | #126 of 1,792 |
| 7Stone County, MO | 72 | 6 | 4.4 | $1.7M | +4.1% | #181 of 1,792 |
| 8Clay County, MO | 68 | 74 | 7.2 | $1.4M | +4.3% | #275 of 1,792 |
| 9Christian County, MO | 67 | 28 | 8.0 | $1.2M | +8.3% | #305 of 1,792 |
| 10St. Charles County, MO | 64 | 144 | 8.9 | $1.4M | +4.9% | #399 of 1,792 |
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 gyms are in St. Charles County, MO?
St. Charles County has 144 gyms on map listings as of September 2026. 41 of them (28%) are chain locations. The listings count gyms and fitness centers. Official counts show 65 businesses with payroll classed as fitness and recreational sports centers in 2023, up 54.8% from 2019. That count covers all fitness and recreational sports centers (yoga, Pilates and fitness studios included), not only gyms.
How much do households in St. Charles County, MO spend on memberships, classes and admissions?
About $195.2M a year, or $1,210 per household. That is 23% above the U.S. average (an index of 123, where 100 is the U.S. average). Spread across the 144 gyms on map listings, it comes to $1.4M per gym. The spending figure covers all memberships, classes and admissions, not only gyms. 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 gyms?
St. Charles County has 8.9 gyms per 10,000 households, 17% above the U.S. rate of 7.6. Spending per gym is $1.4M, 4% above the U.S. figure of $1.3M. At the national ratio of gyms to household spending, St. Charles County would have about 150, against 144 on map listings. There is one business with payroll in the industry for every 2,482 households, against one for every 3,109 across the U.S. The official count rose 54.8% from 2019 to 2023, against +5.8% 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 64 for gyms (upper middle), #399 of 1,792 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 gyms 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 gyms · 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.