Williamson County, IL

Comprehensive housing, income, and cost of living data for Williamson County, Illinois. Population: 67.1K.

Median Home Price
$160.2K

Based on 8 cities

Median Household Income
$65.5K

Annual household income

Price-to-Income Ratio
2.4x

Highly affordable

Salary Needed to Buy
$46.5K

30-yr mortgage, 6.5% rate, 20% down

Housing & Finance

Annual Property Tax
$2,490

Average annual amount

Effective Tax Rate
1.55%

Property tax / home value

Monthly Housing Costs
Mortgage (P&I)$810
Property Tax$208
Insurance$66.75
Total Monthly$1,084
Historical Home Prices
2015
$107.1K
2016
$108.7K
+1.4%%
2017
$111.8K
+2.8%%
2018
$109.1K
-2.4%%
2019
$118.8K
+8.9%%
2020
$125.4K
+5.6%%
2021
$130.1K
+3.8%%
2022
$135.0K
+3.8%%
2023
$141.1K
+4.5%%
2024
$143.8K
+1.9%%
2025
$145.9K
+1.5%%
Source: County price history data via Zillow ZHVI

Demographics & Economics

Unemployment Rate
4.9%%

Near national average

Population Density
160

People per square mile

Homicide Rate
3.2

Low (per 100K residents)

Political Lean (2020)
Competitive

R+0

Racial Demographics

White
88.2%
Black
3.5%
Hispanic
2.8%
Asian
1.5%
Two or More Races
3.6%

Source: Census ACS 2023. Hispanic/Latino ethnicity counted separately from race.

Climate & Environment

Average Temperature
56°F

Annual average

Sunny Days
206

Days per year

Annual Rainfall
48.3"

Inches per year

Natural Disaster Risk
High Risk

Score: 86/100

Frequently Asked Questions

What is the median home price in Williamson County, IL?

The median home price in Williamson County, Illinois is $160.2K. The price-to-income ratio is 2.4x, meaning the median home costs 2.4 times the median household income.

What salary do you need to buy a home in Williamson County?

Based on a 30-year mortgage at 6.5% with 20% down and the 28% debt-to-income rule, you need approximately $46.5K per year to buy the median home in Williamson County, IL. Monthly housing costs break down to $810 for mortgage, $208 for property tax, and $66.75 for insurance.

What is the property tax rate in Williamson County?

The effective property tax rate in Williamson County is 1.55%, which comes to approximately $2,490 per year on the median home.

What is the median household income in Williamson County?

The median household income in Williamson County, Illinois is $65.5K per year, based on Census Bureau American Community Survey data. The unemployment rate is 4.9%%.

Is Williamson County a good place to live?

Williamson County, Illinois has a population of 67.1K. Housing affordability is strong with a price-to-income ratio of 2.4x. The climate averages 56 degrees F with 206 sunny days per year. Compare Williamson County with other areas using our cost of living tools to find the best fit for your budget and lifestyle.