Skip to main content
LiveWhere us
Davenport-Moline-Rock Island, IA-IL

Cost of living in Rock Island County, IL

Part of the Davenport Metro Area

Estimated monthly cost
$2,853/mo
for a single person, all categories combined

Population 142,995 · Last updated May 21, 2026

Cost breakdown

Single person, by category, per month.

Rent $831 29%
Federal tax $486 17%
Healthcare $480 17%
Groceries $345 12%
Transport $320 11%
Energy $177 6%
State tax $164 6%
Water $50 2%

Rent in Rock Island County

Fair Market Rents by bedroom count.

Studio
$707
per month
1 bedroom
$831
per month
2 bedroom
$1,025
per month
3 bedroom
$1,336
per month
4 bedroom
$1,578
per month

Source: HUD FMR FY2025

Income and earnings in Rock Island County

Annual earnings figures from the Census ACS.

Household income
$66,768
per year
Individual earnings
$39,805
per year
Per capita
$35,753
per year

Source: ACS 2019-2023 5-Year.

Home values in Rock Island County

Average values reported by homeowners.

Average home value
$144,700
Annual property tax
$3,372

Source: ACS 2019-2023 5-Year

Energy costs in Rock Island County

Estimated monthly electricity and gas costs.

Electricity
$116
per month · 16.5¢/kWh
Natural gas
$61
per month
Annual total
$2,124
per year

Source: EIA

Healthcare in Rock Island County

Insurance premiums and coverage rates.

Individual premium
$480
per month
Family premium
$1,350
per month
Uninsured rate
6.0%

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 Rock Island County

State and local tax rates for Illinois.

State income tax
5.0%
Flat rate
State sales tax
6.3%
Combined sales tax
8.8%
incl. average local

Tax rates change. Consult a qualified tax professional for advice on your specific situation. This is not tax advice.

Transportation in Rock Island County

Commute patterns and estimated costs.

Average commute
20.2 min
Drive alone
79.1%
Public transit
1.5%
Work from home
6.7%

Source: ACS

Monthly cost estimates for Rock Island County

What it costs to live in Rock Island County each month.

Single person
$2,853
per month
  • Rent $831
  • Energy $177
  • Water $50
  • Groceries $345
  • Transport $320
  • Healthcare $480
  • Federal tax $486
  • State tax $164
Couple
$4,191
per month
  • Rent $1,025
  • Energy $212
  • Water $60
  • Groceries $572
  • Transport $420
  • Healthcare $864
  • Federal tax $763
  • State tax $275
Family
$6,647
per month
  • Rent $1,336
  • Energy $266
  • Water $70
  • Groceries $867
  • Transport $520
  • Healthcare $1,350
  • Childcare $1,200
  • Federal tax $763
  • State tax $275

Frequently asked questions about Rock Island County

Common questions about cost of living, rent and salary.

What is the average rent in Rock Island County?

In Rock Island County, IL, a one-bedroom apartment averages $831 per month, a two-bedroom averages $1,025 per month, a three-bedroom averages $1,336 per month, according to HUD Fair Market Rent data.

What is the average salary in Rock Island County?

In Rock Island County, IL, the average household income is $66,768 per year and individual earnings for full-time workers average $39,805 per year, according to U.S. Census Bureau data.

What is the cost of living in Rock Island County?

The estimated cost of living in Rock Island County, IL is approximately $2,853 per month for a single person, $4,191 for a couple, $6,647 for a family. This includes rent, utilities, groceries, transportation, healthcare, and taxes.

What is the sales tax rate in Rock Island County?

The combined sales tax rate in Rock Island County, IL is 8.82%, which includes the Illinois state rate of 6.25% plus an average local rate of 2.57%.

Is Rock Island County an affordable place to live?

Based on the data, a single person in Rock Island County, IL would need approximately $2,853 per month to cover rent, utilities, food, transport, healthcare, and taxes. The average household income is $66,768 per year ($5,564 per month). Rock Island County has a moderate cost of living relative to local earnings.

How much does healthcare cost in Rock Island County?

The ACA marketplace benchmark premium in Rock Island County, IL is approximately $480 per month for an individual. Approximately 6.0% of residents are uninsured. Actual costs vary based on employer coverage, plan type, and individual circumstances.

What are house prices in Rock Island County?

The average home value in Rock Island County, IL is $144,700, with average annual property taxes of $3,372, according to U.S. Census Bureau data.

How does Rock Island County compare to other areas?

You can compare Rock Island County, IL with any other US county using our comparison tool at /compare. Rock Island County is in the Davenport-Moline-Rock Island, IA-IL metro area.

Other counties in Illinois

Browse the full list of counties in Illinois, ranked by cost of living.

See all counties in Illinois

Compare Rock Island County with another area

Put two counties side by side to see how rent, taxes and everyday costs stack up.

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
Methodology All data sources