Health care · County · Illinois
Medical and dental practices in St. Clair County, IL
Competitor counts, household spending and official business counts for medical and dental practices in St. Clair County, IL, set against other counties and the U.S.
Groundwork market score · out of 100
Score 44 out of 100: Lower middle
Ranked #1,460 of 2,394 scored counties
#66 of 87 scored counties in Illinois
- Listings
- 712
- 99 chain locations (14%)
- Official establishments
- 320
- −7.2% since 2019
- Household spending a year
- $143M
- On medical and dental services · $1,418 a household
- Spending per listing
- $201K
- 32% above the U.S.
- Listings per 10k households
- 70.6
- 16% below the U.S.
- Population, 2025
- 250,708
- −2.5% since 2020
See the medical and dental practices around any address in St. Clair County
The site report maps the medical and dental practices 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. Clair 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 712 medical and dental practices in St. Clair County. Of those, 99 are chain locations, or 14%, against 11% across the U.S. Per 10,000 households, that is 70.6, 16% below the U.S. rate of 84.5.
Household spending on medical and dental services in St. Clair County comes to about $143M a year: $1,418 per household, 10% above the U.S. average. Spread across 712 medical and dental practices, that is $201K per practice, 32% above the U.S. figure of $152K.
Official counts show 320 businesses with payroll classed as offices of physicians, dentists, chiropractors, optometrists and therapists, and urgent care centers in St. Clair County in 2023, down 7.2% from 2019. That is one for every 315 households, against one for every 270 across the U.S. Official counts also show 105 one-person businesses without payroll. Since fiscal 2022, 2 SBA-backed loans worth $351K have gone to businesses classed as offices of physicians, dentists, chiropractors, optometrists and therapists, and urgent care centers in St. Clair County.
Between 2020 and 2025, the population of St. Clair County declined 2.5%, against +3.1% for the U.S. The Groundwork market score for medical and dental practices in St. Clair County is 44 (lower middle), #1,460 of 2,394 scored counties and #66 of 87 scored counties in Illinois.
How St. Clair County compares
The same measures for Illinois and the whole U.S. Spending per listing divides a year of household spending on all medical and dental services by the medical and dental practices 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. Clair County | Illinois | U.S. |
|---|---|---|---|
| Listings per 10k households | 70.6 | 102.3 | 84.5 |
| Spending per listing | $201K | $148K | $152K |
| Households per official establishment | 315 | 269 | 270 |
| Official establishment growth, 2019–2023 | −7.2% | +0.1% | +1.5% |
| Population growth, 2020–2025 | −2.5% | −0.6% | +3.1% |
| Spending per household on medical and dental services | $1,418 | $1,517 | $1,288 |
| Median household income | $73,854 | $83,390 | $80,734 |
| Groundwork market score | 44 | 43 |
Official counts and lending
Businesses
- Official establishments, 2019 to 2023
- 345 → 320−7.2% over the period
- Employees, 2023
- 3,038
- Annual payroll, 2023
- $270.6M
- One-person businesses, 2023
- 105Businesses with no payroll
- Map listings, September 2026
- 71299 chain locations
- Listings at the U.S. rate for this spending
- 938The U.S. ratio of listings to household spending, applied here
SBA-backed loans since fiscal 2022
- Loans
- 2
- Amount
- $351K
SBA-backed loans to businesses classed as offices of physicians, dentists, chiropractors, optometrists and therapists, and urgent care centers in St. Clair 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. Clair County
- Population, 2025 estimate
- 250,708−2.5% since 2020
- Households
- 100,846
- Median age
- 40.3
- Homes lived in by their owners
- 68%
- Vehicles per household
- 1.8
- Land area
- 658 sq. mi.
- People per square mile
- 386
- Median household income
- $73,854+33.8% vs. 2015–2019, before inflation
- Average household income
- $96,153
- Median home value
- $180,300
- Jobs located here
- 90,959
- Daytime population
- 229,240Residents who don’t work, plus everyone whose job is here
Looking at a specific site in St. Clair 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 medical and dental practices on map listings by name and distance.
Or open the report at the center of St. Clair County. Signed out, you see a blurred preview; on an account, each report is one action.
Free10 actions over 3 days, no cardDoctors, dentists and clinics across Illinois
Every Illinois market ranked →The highest-scoring counties in Illinois for medical and dental practices, numbered among those based in Illinois, with St. Clair County marked.
Top counties in Illinois
| Market | Score | Listings | Per 10k households | Spending per listing | Population growth | U.S. rank |
|---|---|---|---|---|---|---|
| 1Piatt County, IL | 84 | 24 | 34.7 | $441K | +0.6% | #51 of 2,394 |
| 2Cumberland County, IL | 76 | 8 | 19.2 | $700K | −2.1% | #162 of 2,394 |
| 3Kendall County, IL | 76 | 285 | 62.8 | $270K | +9.9% | #184 of 2,394 |
| 4Crawford County, IL | 75 | 32 | 42.7 | $317K | +0.1% | #213 of 2,394 |
| 5Woodford County, IL | 75 | 75 | 51.1 | $304K | −0.8% | #215 of 2,394 |
| 6Johnson County, IL | 74 | 6 | 14.6 | $876K | +0.4% | #220 of 2,394 |
| 7Mercer County, IL | 74 | 21 | 32.0 | $436K | −2.6% | #227 of 2,394 |
| 8Washington County, IL | 74 | 21 | 36.2 | $383K | −1.2% | #229 of 2,394 |
| 9Carroll County, IL | 73 | 20 | 30.4 | $419K | −1.7% | #250 of 2,394 |
| 10Hancock County, IL | 72 | 16 | 21.0 | $618K | −4.4% | #270 of 2,394 |
| 66St. Clair County, IL | 44 | 712 | 70.6 | $201K | −2.5% | #1,460 of 2,394 |
Other business types in St. Clair 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
- Doctors, dentists and clinics44
- Dentists and orthodontists58
- Primary care and pediatrics52
- Urgent care and walk-in clinics
- Chiropractors34
- Physical therapy57
- Optometrists and eye care44
Child care
Clothing and laundry
Home services
Real estate
Funeral services
Questions
How many medical and dental practices are in St. Clair County, IL?
There are 712 medical and dental practices on map listings in St. Clair County as of September 2026. 99 of them (14%) are chain locations. The listings count every outpatient clinic and practice, and urgent care. Official counts show 320 businesses with payroll classed as offices of physicians, dentists, chiropractors, optometrists and therapists, and urgent care centers in 2023, down 7.2% from 2019. Another 105 one-person businesses have no payroll, by official counts.
How much do households in St. Clair County, IL spend on medical and dental services?
About $143M a year, or $1,418 per household. That is 10% above the U.S. average (an index of 110, where 100 is the U.S. average). Spread across the 712 medical and dental practices on map listings, it comes to $201K per practice. It is estimated from the incomes of the 100,846 households in St. Clair County and national spending patterns by income.
How does St. Clair County, IL compare with the U.S. for medical and dental practices?
St. Clair County has 70.6 medical and dental practices per 10,000 households, 16% below the U.S. rate of 84.5. Spending per practice is $201K, 32% above the U.S. figure of $152K. At the national ratio of medical and dental practices to household spending, St. Clair County would have about 938, against 712 on map listings. There is one business with payroll in the industry for every 315 households, against one for every 270 across the U.S. The official count fell 7.2% from 2019 to 2023, against +1.5% for the U.S.
How fast is St. Clair County, IL growing?
Population estimates put St. Clair County at 250,708 people in 2025, down 2.5% since 2020, against +3.1% for the U.S. It has 100,846 households. Median household income in St. Clair County is $73,854, 9% below the U.S. median of $80,734. Against the 2015–2019 survey, the median rose 33.8%, 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. Clair County scores 44 for medical and dental practices (lower middle), #1,460 of 2,394 scored counties.
How can I see the market around a specific site?
Run a Groundwork site report on an address in St. Clair County. It maps the medical and dental practices 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 medical and dental practices · All 56 business types in St. Clair County
Screening a site or an acquisition in St. Clair 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. Clair 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.