Knox County, IL Property Taxes (2026)

Knox County owners pay a median of $2,044 a year on a median home value of $104,900, an effective rate of 1.95%. That's the 39th-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)

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Effective tax rate

1.95%

39th highest of 102 in IL

Median annual bill

$2,044

~$170/month

Median home value

$104,900

Illinois county median

1.85%

Effective rate

What a protest could save you in Knox County

Enter the market value from your appraisal notice. We apply Knox County's 1.95% effective rate and a 10–15% reduction, the typical range for successful protests.

$
Est. annual tax
$2,046
Savings at 10–15% off
$205–$307
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Knox County vs. Illinois vs. U.S. property tax rates

Knox County1.95%
Illinois county median1.85%
U.S. county median0.84%

Key stat: Knox County's effective property tax rate is 1.95%, vs. 1.85% for the median Illinois county and 0.84% for the median U.S. county. It ranks 39th 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 Knox County

  1. 1

    Review your assessment notice

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

  2. 2

    File your appeal before the deadline

    The Knox 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 $2,044 bill, 10–15% off is $204–$307 a year.

Want help with it?

TaxDrop builds your case from comparable sales data.

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Property tax exemptions in Illinois

Illinois homeowners may qualify for exemptions that reduce taxable value. Check with the Knox 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 Knox County, Illinois?
The median effective property tax rate in Knox County is 1.95%: a median annual bill of $2,044 on a median home value of $104,900. That's the 39th-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 Knox County?
The median Knox County property tax bill is $2,044 a year, about $170 a month, compared with a Illinois county median of $2,363.
What is the deadline to appeal property taxes in Knox County?
The deadline to appeal in Knox County is 30 days after publication. Missing it means waiting until the next assessment cycle.
Is Knox County a high property tax area?
Knox County's 1.95% effective rate is above the Illinois county median of 1.85% and above the U.S. county median of 0.84%. That's the 39th-highest rate of 102 Illinois counties with Census data.
Can TaxDrop help lower my Knox County property taxes?
TaxDrop analyzes your property against local comparable sales and helps you appeal your assessment.

Property taxes in nearby counties

Warren County

Rate: 1.90%

Median bill: $1,921

Stark County

Rate: 1.64%

Median bill: $1,700

Peoria County

Rate: 2.24%

Median bill: $3,416

Henry County

Rate: 1.98%

Median bill: $2,877

Fulton County

Rate: 2.13%

Median bill: $2,186

Mercer County

Rate: 1.95%

Median bill: $2,710

Henderson County

Rate: 1.68%

Median bill: $1,703

McDonough County

Rate: 2.16%

Median bill: $2,238

← All 102 Illinois counties

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