Warren County, IL Property Taxes (2026)

Warren County owners pay a median of $1,921 a year on a median home value of $101,300, an effective rate of 1.90%. That's the 46th-highest rate of 102 Illinois counties with Census data, above the Illinois county median of 1.85%.

Updated October 2026 · Data: U.S. Census Bureau, American Community Survey 5-Year Estimates (2019–2023)

Is your Warren appraisal too high?

We compare your value to recent Warren County sales and show you in about a minute whether a appeal is worth it.

  • Free check
  • No credit card

Effective tax rate

1.90%

46th highest of 102 in IL

Median annual bill

$1,921

~$160/month

Median home value

$101,300

Illinois county median

1.85%

Effective rate

What a protest could save you in Warren County

Enter the market value from your appraisal notice. We apply Warren County's 1.90% effective rate and a 10–15% reduction, the typical range for successful protests.

$
Est. annual tax
$1,925
Savings at 10–15% off
$192–$289
Check my actual assessment →

Warren County vs. Illinois vs. U.S. property tax rates

Warren County1.90%
Illinois county median1.85%
U.S. county median0.84%

Key stat: Warren County's effective property tax rate is 1.90%, vs. 1.85% for the median Illinois county and 0.84% for the median U.S. county. It ranks 46th of 102 in Illinois. Effective rate = median tax bill ÷ median home value, so it already reflects typical exemptions. (Source: U.S. Census Bureau, American Community Survey 5-Year Estimates (2019–2023))

How to appeal your property taxes in Warren County

  1. 1

    Review your assessment notice

    Check the assessed value from the Warren County Assessor. Compare it to recent sales of similar homes nearby.

  2. 2

    File your appeal before the deadline

    The Warren County deadline is 30 days after publication. Missing it means waiting until the next assessment year.

  3. 3

    Gather evidence

    Recent comparable sales, photos of condition issues, repair estimates or an independent appraisal.

  4. 4

    Present your case

    Submit evidence or attend a hearing with the County Assessor.

  5. 5

    Get your decision

    If you win, your assessed value and bill go down. On a $1,921 bill, 10–15% off is $192–$288 a year.

Want help with it?

TaxDrop builds your case from comparable sales data.

Check my assessment

Property tax exemptions in Illinois

Illinois homeowners may qualify for exemptions that reduce taxable value. Check with the Warren County Assessor for amounts.

Homestead exemption

For your primary residence. Reduces the value used to calculate your bill.

Senior / over-65

Many states add an exemption or freeze for owners 65 and older.

Disability

For homeowners with qualifying disabilities, often similar to the over-65 benefit.

Veterans

Disabled veterans may get partial or full exemptions depending on rating.

Frequently Asked Questions

What is the property tax rate in Warren County, Illinois?
The median effective property tax rate in Warren County is 1.90%: a median annual bill of $1,921 on a median home value of $101,300. That's the 46th-highest rate of 102 Illinois counties with Census data. Your own rate depends on which city, school district and special districts you're in. Source: U.S. Census Bureau, American Community Survey 5-Year Estimates (2019–2023).
How much are property taxes in Warren County?
The median Warren County property tax bill is $1,921 a year, about $160 a month, compared with a Illinois county median of $2,363.
What is the deadline to appeal property taxes in Warren County?
The deadline to appeal in Warren County is 30 days after publication. Missing it means waiting until the next assessment cycle.
Is Warren County a high property tax area?
Warren County's 1.90% effective rate is above the Illinois county median of 1.85% and above the U.S. county median of 0.84%. That's the 46th-highest rate of 102 Illinois counties with Census data.
Can TaxDrop help lower my Warren County property taxes?
TaxDrop analyzes your property against local comparable sales and helps you appeal your assessment.

Property taxes in nearby counties

Henderson County

Rate: 1.68%

Median bill: $1,703

Knox County

Rate: 1.95%

Median bill: $2,044

Mercer County

Rate: 1.95%

Median bill: $2,710

McDonough County

Rate: 2.16%

Median bill: $2,238

Fulton County

Rate: 2.13%

Median bill: $2,186

Hancock County

Rate: 1.86%

Median bill: $2,020

Rock Island County

Rate: 2.33%

Median bill: $3,372

Henry County

Rate: 1.98%

Median bill: $2,877

← All 102 Illinois counties

Stop overpaying on property taxes

See in about a minute whether your Warren value looks too high.

Check my assessment — free