Knox County Property Tax Calculator
In Knox County, the median property tax bill is $2,044 a year on a home worth around $104,900 — an effective rate of 1.95% of value. That is the 39th highest of the 102 counties in Illinois (state average 1.88%). On a $350,000 home that works out to about $6,825/year ($569/month in escrow). Enter your home value below.
$3,850 / year
$320.83/month in escrow · effective rate 1.10% of value
Effective rates are state averages (Tax Foundation / Census ACS). Your local rate, assessment ratio and exemptions vary by county — adjust the rate for an exact bill. How we calculate →
Knox County property tax rate vs the rest of Illinois
Knox County has an effective property tax rate of 1.95% — its median real-estate tax bill ($2,044) as a share of its median home value ($104,900). That is above Illinois's 1.88% state average, and ranks the 39th highest of the 102 counties in Illinois.
Rates are set by local taxing bodies — the county, your city or town, and the school district — so two homes of the same value in different parts of Illinois can owe very different amounts. The calculator above starts from Knox County's 1.95% effective rate; adjust it to your exact municipality or add a homestead exemption for a closer estimate.
Property tax by home value in Knox County
Estimated annual Knox County property tax at its 1.95% effective rate:
$250,000 home → $4,875/yr · $350,000 home → $6,825/yr · $500,000 home → $9,750/yr.
Divide by 12 for the monthly escrow amount your mortgage servicer collects — for example $569/month on a $350,000 home. These figures use the county effective rate; your local rate and any exemptions change the final bill.
How affordable is property tax in Knox County?
The typical Knox County homeowner pays about $2,044 in property tax against a median household income of $53,291 — roughly 3.8% of income a year. That ratio is a quick way to compare the real weight of property tax across counties, since a low rate on an expensive home can still be a large dollar bill.
How Knox County property tax is calculated
Knox County's assessor sets your home's assessed value, and local millage rates from the county, municipality and school district are applied to it; the 1.95% effective rate rolls all of that into one share of market value. To estimate your tax, multiply your home value by 1.95% (or your exact local rate), then subtract any homestead or senior exemption you qualify for. The calculator above does this and shows both the annual bill and the monthly escrow amount.
Knox County property tax — frequently asked questions
What is the property tax rate in Knox County?
Knox County's effective property tax rate is 1.95% of home value in 2026 — its median $2,044 bill on a median $104,900 home. That is the 39th highest of the 102 counties in Illinois, where the state average is 1.88%.
How much is property tax on a $350,000 home in Knox County?
At Knox County's 1.95% effective rate, a $350,000 home owes about $6,825 a year — roughly $569 a month through escrow. Your exact municipality and any exemptions can move this up or down.
Is property tax high in Knox County?
Knox County ranks the 39th highest of the 102 counties in Illinois by effective rate (1.95% vs the 1.88% state average), so it is on the higher side for Illinois. The median bill is $2,044 a year.
What is the median property tax in Knox County?
The median Knox County homeowner pays about $2,044 a year, on a median home value of around $104,900 — an effective rate near 1.95% (US Census ACS).
How is Knox County property tax calculated?
Multiply your home's value by Knox County's effective rate (1.95%, or your exact local millage), then subtract any homestead exemption. The county assessor sets the assessed value and local bodies set the rates; the calculator above estimates the annual and monthly amounts.
Compare nearby counties in Illinois
See all 102 Illinois counties ranked by property tax rate, or compare:
Researched & verified by the Calcuris Data & Research Team. How we build and check our tools →