County profile · Illinois
Marion County, IL market data
How Marion County compares with other counties for 56 business types: competitors, household spending, official counts and growth.
- Population, 2025
- 36,382
- −3.4% since 2020
- Households
- 15,512
- Median household income
- $61,240
- +28.9% vs. 2015–2019, before inflation
- Median home value
- $103,000
- Jobs located here
- 13,082
- Highest market score
- 69
- Dentists and orthodontists, #276 of 1,886 scored counties
A site report maps the competitors on map listings around any address in Marion County by name and distance, and the households and spending within reach. Or open the report at the center of Marion 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
Marion County has an estimated 36,382 people and 15,512 households. Population estimates put the population change in Marion County from 2020 to 2025 at −3.4%, against +3.1% for the U.S. Median household income in Marion County is $61,240, 24% below the U.S. median of $80,734. Against the 2015–2019 survey, the median rose 28.9%, before inflation.
Relative to the U.S., household spending in Marion County runs highest on vehicle maintenance and repairs (an index of 105, where 100 is the U.S. average) and lowest on child care and other personal services (55).
Of the business types scored in Marion County, dentists and orthodontists (69); clothing and shoe stores (62); and clothing, shoe and laundry businesses (59) have the highest Groundwork market scores. For dentists and orthodontists, that ranks #276 of 1,886 scored counties.
Marion County is part of the Centralia area. Against the U.S., map listings per household run highest for insurance agencies (45% above the U.S. rate) and lowest for real estate businesses (58% below the U.S. rate).
All 56 business types in Marion County
Highest Groundwork market score first. Each score compares Marion County with other counties for that business type, from 0 to 100. Spending per listing divides a whole spending line (all vehicle repairs, all eating out) by one type’s listings: the demand for each competitor, not a business’s revenue. Compare it across markets with its index, where 100 is the U.S. figure for the same type; the real estate types, whose line is all housing costs, show the index only. How the score works.
| Business type | Score | Rank among counties | Listings | Per 10k households | Spending per listing | Spending per listing vs. U.S. (100) | Official establishments |
|---|---|---|---|---|---|---|---|
| Dentists and orthodontists | 69 | #276 of 1,886 | 6 | 3.9 | $3.3M | 331 | 7 |
| Clothing and shoe stores | 62 | #598 of 2,087 | 11 | 7.1 | $2.5M | 193 | 3 |
| Clothing, shoes and laundry | 59 | #740 of 2,210 | 19 | 12.2 | $1.4M | 162 | 3 |
| Lawn, cleaning and pest control | 58 | #543 of 1,771 | 6 | 3.9 | $2.8M | 169 | 9 |
| Primary care and pediatrics | 55 | #669 of 1,656 | 7 | 4.5 | $2.8M | 157 | 19 |
| Gyms, studios and classes | 54 | #840 of 2,088 | 12 | 7.7 | $902K | 136 | 6 |
| Bakeries and dessert shops | 52 | #837 of 1,889 | 6 | 3.9 | $8.7M | 211 | 9 |
| Grocery and convenience stores | 51 | #1,167 of 2,402 | 31 | 20.0 | $2.8M | 82 | 4 |
| HVAC and plumbing | 49 | #879 of 1,707 | 6 | 3.9 | $6.3M | 132 | 12 |
| Fast food and sandwich shops | 49 | #1,166 of 2,222 | 16 | 10.3 | $3.3M | 107 | 25 |
| Home repair trades | 48 | #1,101 of 2,057 | 13 | 8.4 | $2.9M | 119 | 21 |
| Car washes and detailing | 46 | #818 of 1,451 | 6 | 3.9 | $2.6M | 103 | Under 3 |
| Real estate | 46 | #1,266 of 2,229 | 25 | 16.1 | Index only | 183 | 10 |
| Doctors, dentists and clinics | 44 | #1,456 of 2,394 | 89 | 57.4 | $219K | 144 | 40 |
| Real estate agents and brokers | 43 | #1,407 of 2,176 | 24 | 15.5 | Index only | 151 | 6 |
| Salons, barbers and spas | 43 | #1,564 of 2,385 | 56 | 36.1 | $242K | 114 | 9 |
| Gas stations | 41 | #1,537 of 2,358 | 19 | 12.2 | $2.1M | 89 | 17 |
| Convenience stores | 40 | #1,470 of 2,261 | 13 | 8.4 | $6.7M | 85 | Under 3 |
| Sit-down restaurants | 40 | #1,617 of 2,405 | 71 | 45.8 | $738K | 111 | 26 |
| Hair salons | 39 | #1,685 of 2,339 | 34 | 21.9 | $399K | 93 | 6 |
| Spas and skin care | 38 | #1,314 of 1,769 | 14 | 9.0 | $969K | 111 | 3 |
| Tire shops | 36 | #1,112 of 1,530 | 7 | 4.5 | $2.2M | 89 | 4 |
| Gyms | 35 | #1,371 of 1,792 | 9 | 5.8 | $1.2M | 92 | 6 |
| Pizza | 34 | #1,666 of 2,090 | 16 | 10.3 | $3.3M | 64 | 25 |
| Restaurants and cafes | 34 | #1,867 of 2,405 | 151 | 97.3 | $347K | 94 | 60 |
| Funeral homes | 32 | #1,179 of 1,472 | 8 | 5.2 | $305K | 45 | Under 3 |
| Coffee shops and cafes | 32 | #1,668 of 2,063 | 15 | 9.7 | $3.5M | 94 | 9 |
| Chiropractors | 31 | #1,245 of 1,490 | 12 | 7.7 | $1.6M | 68 | 5 |
| Pet businesses | 30 | #1,861 of 2,200 | 19 | 12.2 | $591K | 67 | 8 |
| Pet grooming and boarding | 28 | #1,230 of 1,461 | 8 | 5.2 | $1.4M | 55 | 3 |
| Grocery stores | 25 | #1,768 of 2,070 | 13 | 8.4 | $6.7M | 72 | Under 3 |
| Optometrists and eye care | 21 | #1,191 of 1,302 | 9 | 5.8 | $2.2M | 69 | 5 |
| Collision repair and body shops | 21 | #1,236 of 1,327 | 7 | 4.5 | $2.2M | 72 | 9 |
| Auto repair and car care | 21 | #2,253 of 2,401 | 75 | 48.3 | $208K | 77 | 35 |
| Veterinarians | 20 | #1,380 of 1,485 | 8 | 5.2 | $1.4M | 52 | 5 |
| Auto repair shops | 20 | #2,248 of 2,378 | 47 | 30.3 | $332K | 75 | 26 |
| Child care and preschools | 17 | #1,525 of 1,611 | 10 | 6.4 | $496K | 50 | 10 |
| Laundromats | 10 | #765 of 785 | 5 | 3.2 | $5.4M | 43 | Under 3 |
| Insurance agencies | 7 | #2,264 of 2,272 | 35 | 22.6 | $702K | 56 | 25 |
| Barbershops | Not scored | Not scored | 4 | 2.6 | $3.4M | 180 | Under 3 |
| Landscaping and lawn care | Not scored | Not scored | 4 | 2.6 | $4.3M | 145 | 9 |
| Nail salons | Not scored | Not scored | 4 | 2.6 | $3.4M | 203 | Under 3 |
| Roofing and gutters | Not scored | Not scored | 4 | 2.6 | $9.4M | 111 | 3 |
| Electricians | Not scored | Not scored | 3 | 1.9 | $12.5M | 104 | 6 |
| Physical therapy | Not scored | Not scored | 3 | 1.9 | $6.5M | 271 | 4 |
| Martial arts and dance studios | Not scored | Not scored | 2 | 1.3 | $5.4M | Too few | Under 3 |
| Urgent care and walk-in clinics | Not scored | Not scored | 2 | 1.3 | $9.8M | Too few | Under 3 |
| Dry cleaners | Not scored | Not scored | 1 | 0.6 | $27M | Too few | Under 3 |
| House cleaning | Not scored | Not scored | 1 | 0.6 | $17M | Too few | Under 3 |
| Mortgage brokers and lenders | Not scored | Not scored | 1 | 0.6 | Index only | Too few | Under 3 |
| Oil change and quick lube | Not scored | Not scored | 1 | 0.6 | $15.6M | Too few | Under 3 |
| Pest control | Not scored | Not scored | 1 | 0.6 | $17M | Too few | Under 3 |
| Pet stores | Not scored | Not scored | 1 | 0.6 | $11.2M | Too few | Under 3 |
| Yoga, Pilates and fitness studios | Not scored | Not scored | 1 | 0.6 | $10.8M | Too few | 6 |
| Home inspectors | Not scored | Not scored | 0 | 0.0 | None listed | None listed | Under 3 |
| Property management | Not scored | Not scored | 0 | 0.0 | None listed | None listed | 3 |
Household spending in Marion County
What households here spend in a year on each line, in total and per household, with the index against the U.S. average (100).
| Spending line | A year, all households | Per household | Index vs. U.S. (100) |
|---|---|---|---|
| Vehicle maintenance and repairs | $15.6M | $1,005 | 105 |
| Gasoline and other fuels | $40.4M | $2,606 | 100 |
| Food away from home | $52.4M | $3,377 | 83 |
| Groceries | $86.6M | $5,586 | 88 |
| Personal care products and services | $13.6M | $874 | 87 |
| Child care and other personal services | $5M | $320 | 55 |
| Memberships, classes and admissions | $10.8M | $698 | 71 |
| Medical and dental services | $19.5M | $1,258 | 98 |
| Pets | $11.2M | $724 | 80 |
| Clothing, shoes and related services | $27M | $1,742 | 85 |
| Vehicle insurance | $24.6M | $1,584 | 81 |
| Home repairs, maintenance and insurance | $37.6M | $2,422 | 80 |
| Lawn care, cleaning and other household services | $17M | $1,098 | 78 |
| Rent and homeowner costs | $198.1M | $12,772 | 77 |
Household spending is estimated from the incomes of the households in each neighborhood, using what households at each income spent nationally in 2024, adjusted for the region. It counts what residents spend, wherever they spend it.
Population and households in Marion County
- Population, 2025 estimate
- 36,382−3.4% since 2020
- Households
- 15,512
- Median age
- 41.1
- Homes lived in by their owners
- 75%
- Vehicles per household
- 1.8
- Land area
- 573 sq. mi.
- People per square mile
- 65
- Median household income
- $61,240+28.9% vs. 2015–2019, before inflation
- Average household income
- $77,168
- Median home value
- $103,000
- Jobs located here
- 13,082
- Daytime population
- 33,907Residents who don’t work, plus everyone whose job is here
Looking at a specific site in Marion 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 competitors on map listings by name and distance, for any of the 56 business types.
Or open the report at the center of Marion County. Signed out, you see a blurred preview; on an account, each report is one action.
Free10 actions over 3 days, no cardRelated markets
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Questions
How fast is Marion County, IL growing?
Population estimates put Marion County at 36,382 people in 2025, down 3.4% since 2020, against +3.1% for the U.S. It has 15,512 households. Median household income rose 28.9% from the 2015–2019 survey, before inflation.
How much do households in Marion County, IL spend?
Households in Marion County spend about $198.1M a year on rent and homeowner costs, $86.6M on groceries and $52.4M on food away from home. Set against the U.S., households in Marion County spend the most on vehicle maintenance and repairs (an index of 105, where 100 is the U.S. average) and the least on child care and other personal services (55).
Which business types have the highest market scores in Marion County, IL?
The highest Groundwork market scores in Marion County are for dentists and orthodontists (69); clothing and shoe stores (62); and clothing, shoe and laundry businesses (59). Marion County ranks #276 of 1,886 scored counties for dentists and orthodontists.
How does Marion County, IL compare with the U.S.?
The median household income in Marion County is $61,240 a year, 24% below the U.S. median of $80,734. The population fell 3.4% from 2020 to 2025, against +3.1% for the U.S. The median home value is $103,000, against $332,700 for the U.S. For its number of households, Marion County has the most map listings, relative to the U.S., for insurance agencies (45% above the U.S. rate) and the fewest for real estate businesses (58% below the U.S. rate).
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. 39 of the 56 business types have a score in Marion County, each ranked against other counties.
How can I see the market around a specific site?
Run a Groundwork site report on an address in Marion County. It maps the competitors 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.
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Screening a site or an acquisition in Marion 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 Marion 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.