County profile · Illinois
Johnson County, IL market data
Population, household spending and competition for 56 business types in Johnson County, each scored against other counties.
- Population, 2025
- 13,363
- +0.4% since 2020
- Households
- 4,101
- Median household income
- $62,528
- +18.5% vs. 2015–2019, before inflation
- Median home value
- $160,500
- Jobs located here
- 2,158
- Highest market score
- 74
- Doctors, dentists and clinics, #220 of 2,394 scored counties
A site report maps the competitors on map listings around any address in Johnson County by name and distance, and the households and spending within reach. Or open the report at the center of Johnson 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
An estimated 13,363 people live in Johnson County, in 4,101 households. Population estimates put the population change in Johnson County from 2020 to 2025 at +0.4%, slower than the U.S. (+3.1%). The median household income in Johnson County is $62,528 a year, 23% below the U.S. median of $80,734. That rose 18.5% from the 2015–2019 survey, before inflation.
Set against the U.S., households in Johnson County spend the most on vehicle maintenance and repairs (an index of 120, where 100 is the U.S. average) and the least on child care and other personal services (57).
The highest Groundwork market scores in Johnson County are for medical and dental practices (74); salons, barbers and spas (64); and restaurants and cafes (61). Johnson County ranks #220 of 2,394 scored counties for medical and dental practices.
For its number of households, Johnson County has the most map listings, relative to the U.S., for gas stations (2.2 times the U.S. rate) and the fewest for sit-down restaurants (36% below the U.S. rate).
All 56 business types in Johnson County
Highest Groundwork market score first. Each score compares Johnson 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 |
|---|---|---|---|---|---|---|---|
| Doctors, dentists and clinics | 74 | #220 of 2,394 | 6 | 14.6 | $876K | 574 | Under 3 |
| Salons, barbers and spas | 64 | #485 of 2,385 | 9 | 21.9 | $404K | 190 | Under 3 |
| Restaurants and cafes | 61 | #711 of 2,405 | 30 | 73.2 | $472K | 127 | 13 |
| Hair salons | 55 | #906 of 2,339 | 7 | 17.1 | $520K | 121 | Under 3 |
| Sit-down restaurants | 53 | #1,024 of 2,405 | 16 | 39.0 | $884K | 133 | 7 |
| Grocery and convenience stores | 52 | #1,108 of 2,402 | 7 | 17.1 | $3.3M | 97 | Under 3 |
| Auto repair shops | 52 | #1,116 of 2,378 | 11 | 26.8 | $428K | 96 | Under 3 |
| Auto repair and car care | 51 | #1,197 of 2,401 | 19 | 46.3 | $248K | 92 | Under 3 |
| Real estate | 50 | #1,057 of 2,229 | 5 | 12.2 | Index only | 244 | Under 3 |
| Real estate agents and brokers | 46 | #1,259 of 2,176 | 5 | 12.2 | Index only | 194 | Under 3 |
| Pizza | 42 | #1,379 of 2,090 | 5 | 12.2 | $2.8M | 56 | 5 |
| Gas stations | 27 | #2,058 of 2,358 | 10 | 24.4 | $1.2M | 51 | 8 |
| Insurance agencies | 25 | #1,954 of 2,272 | 8 | 19.5 | $925K | 74 | 5 |
| Pet businesses | 21 | #2,095 of 2,200 | 7 | 17.1 | $434K | 49 | Under 3 |
| Clothing, shoes and laundry | Not scored | Not scored | 4 | 9.8 | $1.8M | 206 | Under 3 |
| Fast food and sandwich shops | Not scored | Not scored | 4 | 9.8 | $3.5M | 116 | 5 |
| Grocery stores | Not scored | Not scored | 3 | 7.3 | $7.7M | 83 | Under 3 |
| Gyms, studios and classes | Not scored | Not scored | 3 | 7.3 | $986K | 149 | Under 3 |
| Bakeries and dessert shops | Not scored | Not scored | 2 | 4.9 | $7.1M | Too few | Under 3 |
| Clothing and shoe stores | Not scored | Not scored | 2 | 4.9 | $3.6M | Too few | Under 3 |
| Convenience stores | Not scored | Not scored | 2 | 4.9 | $11.6M | Too few | Under 3 |
| Funeral homes | Not scored | Not scored | 2 | 4.9 | $437K | Too few | Under 3 |
| Home repair trades | Not scored | Not scored | 2 | 4.9 | $5M | Too few | 3 |
| HVAC and plumbing | Not scored | Not scored | 2 | 4.9 | $5M | Too few | 3 |
| Landscaping and lawn care | Not scored | Not scored | 2 | 4.9 | $2.3M | Too few | 4 |
| Lawn, cleaning and pest control | Not scored | Not scored | 2 | 4.9 | $2.3M | Too few | 4 |
| Martial arts and dance studios | Not scored | Not scored | 2 | 4.9 | $1.5M | Too few | Under 3 |
| Pet grooming and boarding | Not scored | Not scored | 2 | 4.9 | $1.5M | Too few | Under 3 |
| Barbershops | Not scored | Not scored | 1 | 2.4 | $3.6M | Too few | Under 3 |
| Child care and preschools | Not scored | Not scored | 1 | 2.4 | $1.4M | Too few | Under 3 |
| Dentists and orthodontists | Not scored | Not scored | 1 | 2.4 | $5.3M | Too few | Under 3 |
| Gyms | Not scored | Not scored | 1 | 2.4 | $3M | Too few | Under 3 |
| Laundromats | Not scored | Not scored | 1 | 2.4 | $7.3M | Too few | Under 3 |
| Physical therapy | Not scored | Not scored | 1 | 2.4 | $5.3M | Too few | Under 3 |
| Primary care and pediatrics | Not scored | Not scored | 1 | 2.4 | $5.3M | Too few | Under 3 |
| Spas and skin care | Not scored | Not scored | 1 | 2.4 | $3.6M | Too few | Under 3 |
| Tire shops | Not scored | Not scored | 1 | 2.4 | $4.7M | Too few | Under 3 |
| Veterinarians | Not scored | Not scored | 1 | 2.4 | $3M | Too few | Under 3 |
| Car washes and detailing | Not scored | Not scored | 0 | 0.0 | None listed | None listed | Under 3 |
| Chiropractors | Not scored | Not scored | 0 | 0.0 | None listed | None listed | Under 3 |
| Coffee shops and cafes | Not scored | Not scored | 0 | 0.0 | None listed | None listed | Under 3 |
| Collision repair and body shops | Not scored | Not scored | 0 | 0.0 | None listed | None listed | Under 3 |
| Dry cleaners | Not scored | Not scored | 0 | 0.0 | None listed | None listed | Under 3 |
| Electricians | Not scored | Not scored | 0 | 0.0 | None listed | None listed | Under 3 |
| Home inspectors | Not scored | Not scored | 0 | 0.0 | None listed | None listed | Under 3 |
| House cleaning | Not scored | Not scored | 0 | 0.0 | None listed | None listed | Under 3 |
| Mortgage brokers and lenders | Not scored | Not scored | 0 | 0.0 | None listed | None listed | Under 3 |
| Nail salons | Not scored | Not scored | 0 | 0.0 | None listed | None listed | Under 3 |
| Oil change and quick lube | Not scored | Not scored | 0 | 0.0 | None listed | None listed | Under 3 |
| Optometrists and eye care | Not scored | Not scored | 0 | 0.0 | None listed | None listed | Under 3 |
| Pest control | Not scored | Not scored | 0 | 0.0 | None listed | None listed | Under 3 |
| Pet stores | 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 | Under 3 |
| Roofing and gutters | Not scored | Not scored | 0 | 0.0 | None listed | None listed | Under 3 |
| Urgent care and walk-in clinics | Not scored | Not scored | 0 | 0.0 | None listed | None listed | Under 3 |
| Yoga, Pilates and fitness studios | Not scored | Not scored | 0 | 0.0 | None listed | None listed | Under 3 |
Household spending in Johnson 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 | $4.7M | $1,148 | 120 |
| Gasoline and other fuels | $12.2M | $2,974 | 115 |
| Food away from home | $14.1M | $3,450 | 85 |
| Groceries | $23.1M | $5,634 | 89 |
| Personal care products and services | $3.6M | $888 | 88 |
| Child care and other personal services | $1.4M | $333 | 57 |
| Memberships, classes and admissions | $3M | $721 | 73 |
| Medical and dental services | $5.3M | $1,281 | 99 |
| Pets | $3M | $741 | 81 |
| Clothing, shoes and related services | $7.3M | $1,771 | 86 |
| Vehicle insurance | $7.4M | $1,805 | 92 |
| Home repairs, maintenance and insurance | $10M | $2,438 | 81 |
| Lawn care, cleaning and other household services | $4.6M | $1,111 | 79 |
| Rent and homeowner costs | $52.9M | $12,890 | 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 Johnson County
- Population, 2025 estimate
- 13,363+0.4% since 2020
- Households
- 4,101
- Median age
- 41.4
- Homes lived in by their owners
- 82%
- Vehicles per household
- 2.0
- Land area
- 344 sq. mi.
- People per square mile
- 39
- Median household income
- $62,528+18.5% vs. 2015–2019, before inflation
- Average household income
- $78,713
- Median home value
- $160,500
- Jobs located here
- 2,158
- Daytime population
- 10,999Residents who don’t work, plus everyone whose job is here
Looking at a specific site in Johnson 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 Johnson County. Signed out, you see a blurred preview; on an account, each report is one action.
Free10 actions over 3 days, no cardRelated markets
Nearest counties in Illinois 8
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- Union County, IL16,997 people
- Williamson County, IL66,876 people
- Massac County, IL13,865 people
- Pulaski County, IL5,015 people
- Saline County, IL23,213 people
- Jackson County, IL53,064 people
- Alexander County, IL4,875 people
Questions
How fast is Johnson County, IL growing?
Population estimates put Johnson County at 13,363 people in 2025, up 0.4% since 2020, slower than the U.S. (+3.1%). It has 4,101 households. Against the 2015–2019 survey, median household income rose 18.5%, before inflation.
How much do households in Johnson County, IL spend?
Households in Johnson County spend about $52.9M a year on rent and homeowner costs, $23.1M on groceries and $14.1M on food away from home. Relative to the U.S., household spending in Johnson County runs highest on vehicle maintenance and repairs (an index of 120, where 100 is the U.S. average) and lowest on child care and other personal services (57).
Which business types have the highest market scores in Johnson County, IL?
Of the business types scored in Johnson County, medical and dental practices (74); salons, barbers and spas (64); and restaurants and cafes (61) have the highest Groundwork market scores. For medical and dental practices, that ranks #220 of 2,394 scored counties.
How does Johnson County, IL compare with the U.S.?
Median household income in Johnson County is $62,528, 23% below the U.S. median of $80,734. The population rose 0.4% from 2020 to 2025, against +3.1% for the U.S. The median home value is $160,500, against $332,700 for the U.S. Against the U.S., map listings per household run highest for gas stations (2.2 times the U.S. rate) and lowest for sit-down restaurants (36% 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. 14 of the 56 business types have a score in Johnson 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 Johnson 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 Johnson 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 Johnson 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.