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Janesville-Beloit, WI

Cost of living in Rock County, WI

Part of the Janesville Metro Area

Estimated monthly cost
$2,948/mo
for a single person, all categories combined

Population 163,944 · Last updated May 21, 2026

Cost breakdown

Single person, by category, per month.

Rent $879 30%
Federal tax $550 19%
Healthcare $480 16%
Groceries $329 11%
Transport $320 11%
Energy $179 6%
State tax $161 5%
Water $50 2%

Rent in Rock County

Fair Market Rents by bedroom count.

Studio
$823
per month
1 bedroom
$879
per month
2 bedroom
$1,153
per month
3 bedroom
$1,509
per month
4 bedroom
$1,531
per month

Source: HUD FMR FY2025

Income and earnings in Rock County

Annual earnings figures from the Census ACS.

Household income
$74,390
per year
Individual earnings
$43,666
per year
Per capita
$37,428
per year

Source: ACS 2019-2023 5-Year.

Home values in Rock County

Average values reported by homeowners.

Average home value
$215,900
Annual property tax
$3,652

Source: ACS 2019-2023 5-Year

Energy costs in Rock County

Estimated monthly electricity and gas costs.

Electricity
$121
per month · 17.3¢/kWh
Natural gas
$58
per month
Annual total
$2,148
per year

Source: EIA

Healthcare in Rock County

Insurance premiums and coverage rates.

Individual premium
$480
per month
Family premium
$1,350
per month
Uninsured rate
5.2%

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 County

State and local tax rates for Wisconsin.

State income tax
7.7%
Top marginal rate
State sales tax
5.0%
Combined sales tax
5.4%
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 County

Commute patterns and estimated costs.

Average commute
23.6 min
Drive alone
80.3%
Public transit
0.5%
Work from home
8.2%

Source: ACS

Monthly cost estimates for Rock County

What it costs to live in Rock County each month.

Single person
$2,948
per month
  • Rent $879
  • Energy $179
  • Water $50
  • Groceries $329
  • Transport $320
  • Healthcare $480
  • Federal tax $550
  • State tax $161
Couple
$4,440
per month
  • Rent $1,153
  • Energy $215
  • Water $60
  • Groceries $545
  • Transport $420
  • Healthcare $864
  • Federal tax $887
  • State tax $296
Family
$6,927
per month
  • Rent $1,509
  • Energy $268
  • Water $70
  • Groceries $827
  • Transport $520
  • Healthcare $1,350
  • Childcare $1,200
  • Federal tax $887
  • State tax $296

Frequently asked questions about Rock County

Common questions about cost of living, rent and salary.

What is the average rent in Rock County?

In Rock County, WI, a one-bedroom apartment averages $879 per month, a two-bedroom averages $1,153 per month, a three-bedroom averages $1,509 per month, according to HUD Fair Market Rent data.

What is the average salary in Rock County?

In Rock County, WI, the average household income is $74,390 per year and individual earnings for full-time workers average $43,666 per year, according to U.S. Census Bureau data.

What is the cost of living in Rock County?

The estimated cost of living in Rock County, WI is approximately $2,948 per month for a single person, $4,440 for a couple, $6,927 for a family. This includes rent, utilities, groceries, transportation, healthcare, and taxes.

What is the sales tax rate in Rock County?

The combined sales tax rate in Rock County, WI is 5.44%, which includes the Wisconsin state rate of 5.00% plus an average local rate of 0.44%.

Is Rock County an affordable place to live?

Based on the data, a single person in Rock County, WI would need approximately $2,948 per month to cover rent, utilities, food, transport, healthcare, and taxes. The average household income is $74,390 per year ($6,199 per month). Rock County is relatively affordable compared to the national average.

How much does healthcare cost in Rock County?

The ACA marketplace benchmark premium in Rock County, WI is approximately $480 per month for an individual. Approximately 5.2% of residents are uninsured. Actual costs vary based on employer coverage, plan type, and individual circumstances.

What are house prices in Rock County?

The average home value in Rock County, WI is $215,900, with average annual property taxes of $3,652, according to U.S. Census Bureau data.

How does Rock County compare to other areas?

You can compare Rock County, WI with any other US county using our comparison tool at /compare. Rock County is in the Janesville-Beloit, WI metro area.

Other counties in Wisconsin

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

See all counties in Wisconsin

Compare Rock 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