Cost of living in Johnson County, IL
Population 13,350 · Last updated May 21, 2026
Cost breakdown
Single person, by category, per month.
Rent in Johnson County
Fair Market Rents by bedroom count.
Source: HUD FMR FY2025
Income and earnings in Johnson County
Annual earnings figures from the Census ACS.
Source: ACS 2019-2023 5-Year.
Home values in Johnson County
Average values reported by homeowners.
Source: ACS 2019-2023 5-Year
Energy costs in Johnson County
Estimated monthly electricity and gas costs.
Source: EIA
Healthcare in Johnson County
Insurance premiums and coverage rates.
Source: ACS + national avg. Marketplace benchmark premiums are second-lowest Silver plan estimates and do not reflect employer plans, subsidies, or out-of-pocket costs. This is not healthcare advice.
Taxes in Johnson County
State and local tax rates for Illinois.
Tax rates change. Consult a qualified tax professional for advice on your specific situation. This is not tax advice.
Transportation in Johnson County
Commute patterns and estimated costs.
Source: ACS
Monthly cost estimates for Johnson County
What it costs to live in Johnson County each month.
- Rent $738
- Energy $177
- Water $50
- Groceries $345
- Transport $320
- Healthcare $480
- Federal tax $465
- State tax $159
- Rent $900
- Energy $212
- Water $60
- Groceries $572
- Transport $420
- Healthcare $864
- Federal tax $737
- State tax $269
- Rent $1,197
- Energy $266
- Water $70
- Groceries $867
- Transport $520
- Healthcare $1,350
- Childcare $1,200
- Federal tax $737
- State tax $269
Frequently asked questions about Johnson County
Common questions about cost of living, rent and salary.
What is the average rent in Johnson County?
In Johnson County, IL, a one-bedroom apartment averages $738 per month, a two-bedroom averages $900 per month, a three-bedroom averages $1,197 per month, according to HUD Fair Market Rent data.
What is the average salary in Johnson County?
In Johnson County, IL, the average household income is $65,203 per year and individual earnings for full-time workers average $38,464 per year, according to U.S. Census Bureau data.
What is the cost of living in Johnson County?
The estimated cost of living in Johnson County, IL is approximately $2,734 per month for a single person, $4,034 for a couple, $6,476 for a family. This includes rent, utilities, groceries, transportation, healthcare, and taxes.
What is the sales tax rate in Johnson County?
The combined sales tax rate in Johnson County, IL is 8.82%, which includes the Illinois state rate of 6.25% plus an average local rate of 2.57%.
Is Johnson County an affordable place to live?
Based on the data, a single person in Johnson County, IL would need approximately $2,734 per month to cover rent, utilities, food, transport, healthcare, and taxes. The average household income is $65,203 per year ($5,434 per month). Johnson County has a moderate cost of living relative to local earnings.
How much does healthcare cost in Johnson County?
The ACA marketplace benchmark premium in Johnson County, IL is approximately $480 per month for an individual. Approximately 7.9% of residents are uninsured. Actual costs vary based on employer coverage, plan type, and individual circumstances.
What are house prices in Johnson County?
The average home value in Johnson County, IL is $148,200, with average annual property taxes of $1,952, according to U.S. Census Bureau data.
How does Johnson County compare to other areas?
You can compare Johnson County, IL with any other US county using our comparison tool at /compare. Johnson County is in Illinois.
Other counties in Illinois
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About this data
All figures on this page come from official U.S. government sources, listed below.
- HUD FMR FY2025
- ACS 2019-2023 5-Year
- EIA
- ACS + national avg
- ACS
- USDA + BEA RPP