Auto · County · Illinois
Insurance agencies in St. Clair County, IL
How St. Clair County, IL compares with other counties and the U.S. for insurance agencies: competitors, household spending, official counts and growth.
Groundwork market score · out of 100
Score 22 out of 100: Low
Ranked #2,030 of 2,272 scored counties
#30 of 87 scored counties in Illinois
- Listings
- 160
- 31 chain locations (19%)
- Official establishments
- 97
- −10.2% since 2019
- Household spending a year
- $158.2M
- On vehicle insurance · $1,569 a household
- Spending per listing
- $989K
- 21% below the U.S.
- Listings per 10k households
- 15.9
- 2% above the U.S.
- Population, 2025
- 250,708
- −2.5% since 2020
See the insurance agencies around any address in St. Clair County
The site report maps the insurance agencies 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
The Groundwork market score for insurance agencies in St. Clair County is 22 (low), #2,030 of 2,272 scored counties and #30 of 87 scored counties in Illinois. That puts it in the bottom quarter of counties.
At $1,569 per household (20% below the U.S. average), households in St. Clair County spend about $158.2M a year on vehicle insurance. That is about $989K of household spending for each agency on map listings, 21% below the U.S. figure of $1.3M.
There are 160 insurance agencies on map listings in St. Clair County as of September 2026. 31 of them (19%) are chain locations, against 21% across the U.S. That comes to 15.9 for every 10,000 households, 2% above the U.S. rate of 15.6.
The official count of businesses with payroll classed as insurance agencies and brokerages in St. Clair County was 97 in 2023, down 10.2% from 2019. That is one for every 1,040 households, against one for every 966 across the U.S. Since fiscal 2022, 1 SBA-backed loan worth $665K has gone to businesses classed as insurance agencies and brokerages in St. Clair County. Between 2020 and 2025, the population of St. Clair County declined 2.5%, against +3.1% for the U.S.
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 vehicle insurance by the insurance agencies 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 | 15.9 | 18.2 | 15.6 |
| Spending per listing | $989K | $795K | $1.3M |
| Households per official establishment | 1,040 | 887 | 966 |
| Official establishment growth, 2019–2023 | −10.2% | −7.0% | −1.0% |
| Population growth, 2020–2025 | −2.5% | −0.6% | +3.1% |
| Spending per household on vehicle insurance | $1,569 | $1,450 | $1,957 |
| Median household income | $73,854 | $83,390 | $80,734 |
| Groundwork market score | 22 | 11 |
Official counts and lending
Businesses
- Official establishments, 2019 to 2023
- 108 → 97−10.2% over the period
- Employees, 2023
- 299
- Annual payroll, 2023
- $18.3M
- One-person businesses, 2023
- Not publishedNot published for this business type
- Map listings, September 2026
- 16031 chain locations
- Listings at the U.S. rate for this spending
- 126The U.S. ratio of listings to household spending, applied here
SBA-backed loans since fiscal 2022
- Loans
- 1
- Amount
- $665K
SBA-backed loans to businesses classed as insurance agencies and brokerages 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 insurance agencies 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 cardInsurance agencies across Illinois
Every Illinois market ranked →The highest-scoring counties in Illinois for insurance agencies, 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 |
|---|---|---|---|---|---|---|
| 1Kendall County, IL | 59 | 56 | 12.3 | $1.5M | +9.9% | #816 of 2,272 |
| 2Boone County, IL | 48 | 21 | 10.8 | $1.7M | +0.4% | #1,169 of 2,272 |
| 3Will County, IL | 40 | 372 | 15.2 | $1.2M | +2.2% | #1,464 of 2,272 |
| 4DeKalb County, IL | 39 | 47 | 11.9 | $1.3M | +1.5% | #1,499 of 2,272 |
| 5Piatt County, IL | 36 | 10 | 14.4 | $1.3M | +0.6% | #1,598 of 2,272 |
| 6Mercer County, IL | 35 | 7 | 10.7 | $1.8M | −2.6% | #1,630 of 2,272 |
| 7Grundy County, IL | 35 | 35 | 17.0 | $1.1M | +2.9% | #1,654 of 2,272 |
| 8McHenry County, IL | 35 | 209 | 17.8 | $1M | +2.5% | #1,660 of 2,272 |
| 9Menard County, IL | 34 | 5 | 9.6 | $1.8M | −3.3% | #1,667 of 2,272 |
| 10Jo Daviess County, IL | 33 | 11 | 10.6 | $1.6M | −2.2% | #1,698 of 2,272 |
| 30St. Clair County, IL | 22 | 160 | 15.9 | $989K | −2.5% | #2,030 of 2,272 |
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
Child care
Clothing and laundry
Home services
Real estate
Funeral services
Questions
How many insurance agencies are in St. Clair County, IL?
As of September 2026, map listings count 160 insurance agencies in St. Clair County. 31 of them (19%) are chain locations. The listings count insurance agencies. Official counts show 97 businesses with payroll classed as insurance agencies and brokerages in 2023, down 10.2% from 2019.
How much do households in St. Clair County, IL spend on vehicle insurance?
About $158.2M a year, or $1,569 per household. That is 20% below the U.S. average (an index of 80, where 100 is the U.S. average). Spread across the 160 insurance agencies on map listings, it comes to $989K per agency. 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 insurance agencies?
St. Clair County has 15.9 insurance agencies per 10,000 households, 2% above the U.S. rate of 15.6. Spending per agency is $989K, 21% below the U.S. figure of $1.3M. At the U.S. ratio of insurance agencies to household spending, St. Clair County would have about 126, against 160 on map listings. There is one business with payroll in the industry for every 1,040 households, against one for every 966 across the U.S. The official count fell 10.2% from 2019 to 2023, against −1.0% 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 22 for insurance agencies (low), #2,030 of 2,272 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 insurance agencies 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 insurance agencies · 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.