Fitness and classes · County · Maryland
Gyms in St. Mary’s County, MD
The gyms in St. Mary’s County, MD, the household spending behind them and how the market ranks against other counties.
Groundwork market score · out of 100
Score 78 out of 100: High
Ranked #84 of 1,792 scored counties
#5 of 23 scored counties in Maryland
- Listings
- 21
- 6 chain locations (29%)
- Official establishments
- 11
- All fitness and recreational sports centers
- Household spending a year
- $48.9M
- On memberships, classes and admissions · $1,152 a household
- Spending per listing
- $2.3M
- 79% above the U.S.
- Listings per 10k households
- 4.9
- 36% below the U.S.
- Population, 2025
- 116,692
- +2.4% since 2020
See the gyms around any address in St. Mary’s 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. Mary’s 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
St. Mary’s County scores 78 (high) on the Groundwork market score for gyms, ranking #84 of 1,792 scored counties and #5 of 23 scored counties in Maryland. That puts it in the top 10% of counties for gyms.
At $1,152 per household (17% above the U.S. average), households in St. Mary’s County spend about $48.9M a year on memberships, classes and admissions. Spread across 21 gyms, that is $2.3M per gym, 79% above the U.S. figure of $1.3M. The spending figure covers all memberships, classes and admissions, not only gyms.
There are 21 gyms on map listings in St. Mary’s County as of September 2026. Chain locations make up 29% of them, against 28% across the U.S. That comes to 4.9 for every 10,000 households, 36% below the U.S. rate of 7.6.
Official counts show 11 businesses with payroll classed as fitness and recreational sports centers in St. Mary’s County in 2023. That is one for every 3,858 households, against one for every 3,109 across the U.S. That count covers all fitness and recreational sports centers (yoga, Pilates and fitness studios included), not only gyms. Since fiscal 2022, 1 SBA-backed loan worth $997K has gone to businesses classed as fitness and recreational sports centers in St. Mary’s County. Population estimates show St. Mary’s County grew 2.4% from 2020 to 2025, slower than the U.S. (+3.1%).
How St. Mary’s County compares
The same measures for Maryland 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. Mary’s County | Maryland | U.S. |
|---|---|---|---|
| Listings per 10k households | 4.9 | 6.6 | 7.6 |
| Spending per listing | $2.3M | $1.6M | $1.3M |
| Households per official establishment (all fitness and recreational sports centers) | 3,858 | 3,356 | 3,109 |
| Official establishment growth, 2019–2023 | n/a | −4.2% | +5.8% |
| Population growth, 2020–2025 | +2.4% | +1.4% | +3.1% |
| Spending per household on memberships, classes and admissions | $1,152 | $1,042 | $983 |
| Median household income | $119,446 | $103,678 | $80,734 |
| Groundwork market score | 78 | 65 |
Official counts and lending
Businesses
- Official establishments, 2019 to 2023
- 9 → 11All fitness and recreational sports centers
- Employees, 2023
- 101
- Annual payroll, 2023
- $1.2M
- One-person businesses, 2023
- Not publishedNot published for this business type
- Map listings, September 2026
- 216 chain locations
- Listings at the U.S. rate for this spending
- 38The U.S. ratio of listings to household spending, applied here
SBA-backed loans since fiscal 2022
- Loans
- 1
- Amount
- $997K
SBA-backed loans to businesses classed as fitness and recreational sports centers in St. Mary’s 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. Mary’s County
- Population, 2025 estimate
- 116,692+2.4% since 2020
- Households
- 42,436
- Median age
- 38.0
- Homes lived in by their owners
- 73%
- Vehicles per household
- 2.1
- Land area
- 359 sq. mi.
- People per square mile
- 321
- Median household income
- $119,446+33.0% vs. 2015–2019, before inflation
- Average household income
- $142,976
- Median home value
- $407,600
- Jobs located here
- 35,732
- Daytime population
- 104,060Residents who don’t work, plus everyone whose job is here
Looking at a specific site in St. Mary’s 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. Mary’s County. Signed out, you see a blurred preview; on an account, each report is one action.
Free10 actions over 3 days, no cardGyms across Maryland
Every Maryland market ranked →The highest-scoring counties in Maryland for gyms, numbered among those based in Maryland, with St. Mary’s County marked.
Top counties in Maryland
| Market | Score | Listings | Per 10k households | Spending per listing | Population growth | U.S. rank |
|---|---|---|---|---|---|---|
| 1Charles County, MD | 89 | 37 | 6.1 | $1.9M | +5.9% | #18 of 1,792 |
| 2Queen Anne’s County, MD | 81 | 16 | 8.0 | $1.4M | +8.8% | #62 of 1,792 |
| 3Calvert County, MD | 80 | 27 | 8.1 | $1.6M | +1.7% | #71 of 1,792 |
| 4Prince George’s County, MD | 79 | 175 | 5.0 | $2M | +0.5% | #77 of 1,792 |
| 5St. Mary’s County, MD | 78 | 21 | 4.9 | $2.3M | +2.4% | #84 of 1,792 |
| 6Cecil County, MD | 74 | 25 | 6.2 | $1.4M | +3.2% | #151 of 1,792 |
| 7Frederick County, MD | 72 | 84 | 8.0 | $1.5M | +11.0% | #190 of 1,792 |
| 8Harford County, MD | 67 | 70 | 6.9 | $1.5M | +2.0% | #287 of 1,792 |
| 9Dorchester County, MD | 66 | 5 | 3.7 | $1.7M | +3.4% | #309 of 1,792 |
| 10Montgomery County, MD | 65 | 265 | 6.8 | $1.9M | +1.3% | #344 of 1,792 |
Other business types in St. Mary’s 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. Mary’s County, MD?
As of September 2026, map listings count 21 gyms in St. Mary’s County. 6 of them (29%) are chain locations. The listings count gyms and fitness centers. Official counts show 11 businesses with payroll classed as fitness and recreational sports centers in 2023. The official count takes in all fitness and recreational sports centers, not only gyms: yoga, Pilates and fitness studios are counted too.
How much do households in St. Mary’s County, MD spend on memberships, classes and admissions?
About $48.9M a year, or $1,152 per household. That is 17% above the U.S. average (an index of 117, where 100 is the U.S. average). Spread across the 21 gyms on map listings, it comes to $2.3M per gym. That spending covers all memberships, classes and admissions, which gyms share with other businesses in the trade. It is estimated from the incomes of the 42,436 households in St. Mary’s County and national spending patterns by income.
How does St. Mary’s County, MD compare with the U.S. for gyms?
St. Mary’s County has 4.9 gyms per 10,000 households, 36% below the U.S. rate of 7.6. Spending per gym is $2.3M, 79% above the U.S. figure of $1.3M. At the U.S. ratio of gyms to household spending, St. Mary’s County would have about 38, against 21 on map listings. There is one business with payroll in the industry for every 3,858 households, against one for every 3,109 across the U.S.
How fast is St. Mary’s County, MD growing?
Population estimates put St. Mary’s County at 116,692 people in 2025, up 2.4% since 2020, slower than the U.S. (+3.1%). It has 42,436 households. Median household income in St. Mary’s County is $119,446, 48% above the U.S. median of $80,734. Against the 2015–2019 survey, the median rose 33.0%, 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. Mary’s County scores 78 for gyms (high), #84 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. Mary’s 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. Mary’s County
Screening a site or an acquisition in St. Mary’s 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. Mary’s 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.