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County tax profile · 2026 · Census ACS + IRS data

Property Tax & Income in Clinton County, Illinois

Clinton County has an effective property tax rate of 1.83%. On the median home value of $192,400, that's roughly $3,524 per year. Median household income is $86,588.

Effective Property Tax Rate1
1.83%
median tax $3,524 ÷ median home $192,400
Median Home Value1
$192,400
owner-occupied
Median Household Income1
$86,588
per-capita $42,658
Est. Annual Tax on Median Home1
$3,524
at 1.83% effective rate

What you'll pay, at a glance

Property taxes are the largest local tax most homeowners pay. The effective rate measures the real tax bill as a share of home value — a more useful number than the nominal “mill rate,” because assessment practices vary county to county.

MetricClinton CountyIllinois (state context)
Effective property tax rate11.83%1.80%
Median home value1$192,400—
State income tax3top rate 4.95%top rate 4.95%
State sales tax38.98% combined8.98% combined

How this is calculated

The effective property tax rate is the median real-estate tax bill divided by the median home value — both for owner-occupied homes, from the U.S. Census Bureau's American Community Survey (ACS 5-year estimates)1. Median income is also from the ACS1. Federal and state income-tax figures use IRS2 and Tax Foundation3 data.

About Clinton County, IL

Clinton County’s effective property tax rate of 1.832% edges past Illinois’s statewide median of 1.804%, placing it 45th among the state’s 102 counties. That statewide figure already dwarfs the national median of 0.794%, so homeowners here face a rate more than double what a typical American county charges. The practical result shows up in the median annual tax bill of $3,524 on a home valued at $192,400. With median household income at $86,588 and per-capita income at $42,658, property taxes claim a meaningful share of local earnings. Communities such as Aviston, Albers, and Bartelso sit within this taxing landscape. Compared with most of the country, Clinton County signals a high-tax environment, though within Illinois it lands close to the middle of the pack rather than at the extreme.

Frequently asked questions

What is the property tax rate in Clinton County, IL?
The effective rate is 1.83% — meaning the median tax bill equals about 1.83% of the median home value.
How much are property taxes on a median home?
On the median home ($192,400), the estimated annual bill is about $3,524.
Is Clinton County's rate high or low?
Compare it to the state median of 1.80% and the national average near 1.1%.
How does the effective rate differ from my mill rate?
A mill rate is the nominal levy per $1,000 of assessed value. The effective rate reflects what you actually pay after exemptions and assessments — it's the median tax bill as a share of median home value, so it better predicts your real cost.
Will a reassessment raise my tax bill?
Not necessarily. If your home's assessed value rises, your bill can go up, but only if the mill rate and exemptions stay flat. Contact the Clinton County assessor's office to review your current assessment.
Can I appeal my property tax assessment?
Yes. Most counties allow an appeal when you believe the assessed value exceeds the market value. File with the Clinton County assessor within the local deadline, typically with comparable sales as evidence.
Sources
[1] U.S. Census Bureau — ACS 5-Year (2023) — Median home value (B25077), median real-estate taxes (B25103), median household income (B19013), per-capita income (B19301).
[2] IRS — Statistics of Income — County income, AGI, and real-estate taxes paid.
[3] Tax Foundation — State income, sales, corporate, and estate/inheritance tax rates.