Fitness and classes · County · Idaho
Gyms in Jefferson County, ID
How Jefferson County, ID compares with other counties and the U.S. for gyms: competitors, household spending, official counts and growth.
Groundwork market score · out of 100
Score 56 out of 100: Upper middle
Ranked #712 of 1,792 scored counties
#14 of 21 scored counties in Idaho
- Listings
- 14
- 3 chain locations (21%)
- Official establishments
- n/a
- Fewer than 3, or not published
- Household spending a year
- $10.8M
- On memberships, classes and admissions · $1,055 a household
- Spending per listing
- $769K
- 41% below the U.S.
- Listings per 10k households
- 13.7
- 80% above the U.S.
- Population, 2025
- 35,297
- +13.6% since 2020
See the gyms around any address in Jefferson 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 Jefferson 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
Map listings as of September 2026 show 14 gyms in Jefferson County. 3 of them (21%) are chain locations, against 28% across the U.S. Per 10,000 households, that is 13.7, 80% above the U.S. rate of 7.6.
Household spending on memberships, classes and admissions in Jefferson County comes to about $10.8M a year: $1,055 per household, 7% above the U.S. average. That is about $769K of household spending for each gym on map listings, 41% below the U.S. figure of $1.3M. That spending covers all memberships, classes and admissions, which gyms share with other businesses in the trade.
There is no official count of businesses with payroll classed as fitness and recreational sports centers in Jefferson County: counts under 3 aren’t published.
Population estimates show Jefferson County grew 13.6% from 2020 to 2025, faster than the U.S. (+3.1%). For gyms, Jefferson County has a Groundwork market score of 56 (upper middle): #712 of 1,792 scored counties and #14 of 21 scored counties in Idaho.
How Jefferson County compares
The same measures for Idaho 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 | Jefferson County | Idaho | U.S. |
|---|---|---|---|
| Listings per 10k households | 13.7 | 8.4 | 7.6 |
| Spending per listing | $769K | $1.2M | $1.3M |
| Households per official establishment (all fitness and recreational sports centers) | n/a | 3,060 | 3,109 |
| Official establishment growth, 2019–2023 | n/a | +18.9% | +5.8% |
| Population growth, 2020–2025 | +13.6% | +9.8% | +3.1% |
| Spending per household on memberships, classes and admissions | $1,055 | $1,038 | $983 |
| Median household income | $86,679 | $77,800 | $80,734 |
| Groundwork market score | 56 | 59 |
Official counts and lending
Businesses
- Official establishments, 2019 to 2023
- n/aAll fitness and recreational sports centers
- Employees, 2023
- n/a
- Annual payroll, 2023
- n/a
- One-person businesses, 2023
- Not publishedNot published for this business type
- Map listings, September 2026
- 143 chain locations
- Listings at the U.S. rate for this spending
- 8The 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 fitness and recreational sports centers in Jefferson 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 Jefferson County
- Population, 2025 estimate
- 35,297+13.6% since 2020
- Households
- 10,199
- Median age
- 32.9
- Homes lived in by their owners
- 83%
- Vehicles per household
- 2.6
- Land area
- 1,094 sq. mi.
- People per square mile
- 30
- Median household income
- $86,679+37.5% vs. 2015–2019, before inflation
- Average household income
- $99,354
- Median home value
- $408,400
- Jobs located here
- 8,448
- Daytime population
- 27,194Residents who don’t work, plus everyone whose job is here
Looking at a specific site in Jefferson 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 Jefferson County. Signed out, you see a blurred preview; on an account, each report is one action.
Free10 actions over 3 days, no cardGyms across Idaho
Every Idaho market ranked →The highest-scoring counties in Idaho for gyms, numbered among those based in Idaho, with Jefferson County marked.
Top counties in Idaho
| Market | Score | Listings | Per 10k households | Spending per listing | Population growth | U.S. rank |
|---|---|---|---|---|---|---|
| 1Canyon County, ID | 90 | 45 | 5.2 | $1.8M | +18.1% | #14 of 1,792 |
| 2Bingham County, ID | 89 | 7 | 4.3 | $2.3M | +6.4% | #17 of 1,792 |
| 3Bonneville County, ID | 72 | 36 | 8.1 | $1.3M | +8.9% | #192 of 1,792 |
| 4Latah County, ID | 67 | 7 | 4.3 | $2M | +5.6% | #278 of 1,792 |
| 5Twin Falls County, ID | 65 | 26 | 7.5 | $1.2M | +7.9% | #372 of 1,792 |
| 6Bonner County, ID | 62 | 15 | 7.4 | $1.3M | +14.8% | #459 of 1,792 |
| 7Ada County, ID | 59 | 213 | 10.5 | $1.2M | +9.6% | #575 of 1,792 |
| 8Nez Perce County, ID | 59 | 15 | 8.7 | $1.1M | +1.8% | #583 of 1,792 |
| 9Blaine County, ID | 58 | 10 | 9.6 | $1.3M | +4.8% | #610 of 1,792 |
| 10Kootenai County, ID | 58 | 65 | 9.1 | $1.1M | +11.0% | #621 of 1,792 |
| 14Jefferson County, ID | 56 | 14 | 13.7 | $769K | +13.6% | #712 of 1,792 |
Other business types in Jefferson 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 Jefferson County, ID?
There are 14 gyms on map listings in Jefferson County as of September 2026. 3 of them (21%) are chain locations. The listings count gyms and fitness centers. No official count is published for fitness and recreational sports centers in Jefferson County: counts under 3 are left out.
How much do households in Jefferson County, ID spend on memberships, classes and admissions?
About $10.8M a year, or $1,055 per household. That is 7% above the U.S. average (an index of 107, where 100 is the U.S. average). Spread across the 14 gyms on map listings, it comes to $769K per gym. The spending figure covers all memberships, classes and admissions, not only gyms. It is estimated from the incomes of the 10,199 households in Jefferson County and national spending patterns by income.
How does Jefferson County, ID compare with the U.S. for gyms?
Jefferson County has 13.7 gyms per 10,000 households, 80% above the U.S. rate of 7.6. Spending per gym is $769K, 41% below the U.S. figure of $1.3M. At the national ratio of gyms to household spending, Jefferson County would have about 8, against 14 on map listings.
How fast is Jefferson County, ID growing?
Population estimates put Jefferson County at 35,297 people in 2025, up 13.6% since 2020, faster than the U.S. (+3.1%). It has 10,199 households. The median household income in Jefferson County is $86,679 a year, 7% above the U.S. median of $80,734. That rose 37.5% 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. Jefferson County scores 56 for gyms (upper middle), #712 of 1,792 scored counties.
How can I see the market around a specific site?
Run a Groundwork site report on an address in Jefferson 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 Jefferson County
Screening a site or an acquisition in Jefferson 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 Jefferson 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.