Knox County, Illinois Property Taxes
Property Taxes in Knox County, Illinois
Median Knox County effective property tax rate: 2.82%, significantly higher than the national median of 1.02%.
Median Knox County home value: $93,540
Median annual Knox County tax bill: $2,355, lower than the national median property tax bill of $2,400.
How are property taxes in Knox County calculated?
Property taxes in Knox County are calculated based on the tax assessed value, which is often lower than the actual market value due to property tax exemptions such as the homestead or senior exemption.
Understanding Knox County’s property tax system, exemptions, and reduction opportunities can lead to significant savings. Whether you live in Galesburg or another part of Knox County, knowing local tax details benefits homeowners and investors.
Last Updated April 13, 2026
Knox County, Illinois Property Tax Bill Calculator
$100,000
$1,500,000
$3,000,000
Median Effective Tax Rate
2.82%
Estimate Property Tax Bill
$2,638
$2,448
How Does the Knox County Property Tax Calculator Work?
Use this Knox County property tax calculator to estimate your annual property tax bill. Enter your property's assessed value and our calculator applies Knox County's median effective tax rate of 2.82% to generate your estimate.
Enter your property's estimated assessed value — the figure the assessment office assigns for tax purposes, which is typically lower than market value after applicable exemptions. Our calculator uses the median effective rate for a more accurate estimate than the statutory millage rate alone.
Your actual bill may vary based on your specific exemptions, local school district levies, and any special assessment districts that apply to your property. Knox County’s median tax rate is higher than the Illinois median tax rate of 2.33%, while the county’s median property tax bill of $2,355 is $45 higher than the state median.
For a more precise estimate, scroll down to explore city and ZIP code-level tax rate trends across Knox County.
Property Tax Rates Across Knox County, Illinois
What Are Effective Property Tax Rates Across Knox County?
Local government entities set tax rates, which vary widely across Knox County. Each year, the county estimates its budget for public services and divides that total by the assessed value of all taxable property within its jurisdiction.
Below, compare Knox County's effective property tax rate to other counties in Illinois or the U.S. median of 1.02%.
Knox County's median effective rate stands at 2.82%, which is higher than the national median of 1.02%. Within Knox County, the highest rate is found in GALESBURG at 3.09%, while DAHINDA has the lowest at 2.44%.
These variations reflect differences in local school district levies, Special service areas (SSAs) assessments, and special district bonds — which compound the base county rate.
Our median effective property tax rate (tax bill ÷ assessor's market value) accounts for exemptions and deductions, making it more accurate than the general median tax rate, which is the midpoint of statutory rates before adjustments.
Median Effective Knox County Tax Rate
2.82%
Our median effective property tax rate (tax bill ÷ assessor's market value) accounts for exemptions and deductions, making it more accurate than the general median tax rate, which is the midpoint of statutory rates before adjustments.
Median Effective Illinois Tax Rate
2.33%
Median Effective United States Tax Rate
1.02%
Property Tax Rates Across Knox County, Illinois
| City | 10th Percentile | 25th Percentile | Median Tax Rate | 75th Percentile | 90th Percentile |
|---|---|---|---|---|---|
| Abingdon | 2.19% | 2.46% | 2.72% | 2.72% | 2.86% |
| Altona | 2.41% | 2.59% | 2.81% | 2.95% | 2.98% |
| Dahinda | 1.73% | 2.28% | 2.44% | 2.60% | 2.65% |
| East Galesburg | 2.48% | 2.48% | 2.48% | 2.48% | 2.53% |
| Farmington | 2.89% | 2.91% | 2.97% | 3.03% | 3.07% |
| Galesburg | 2.40% | 3.09% | 3.09% | 3.09% | 3.09% |
| Galva | 2.01% | 2.49% | 2.83% | 2.95% | 3.01% |
| Gilson | 1.71% | 2.27% | 2.59% | 2.82% | 2.89% |
| Knoxville | 1.72% | 2.27% | 2.60% | 2.69% | 2.78% |
| La Fayette | 2.38% | 2.64% | 3.02% | 3.22% | 3.27% |
| London Mills | 1.98% | 2.44% | 2.79% | 2.95% | 3.02% |
| Maquon | 2.05% | 2.52% | 2.77% | 2.94% | 3.01% |
| Oneida | 2.22% | 2.51% | 2.74% | 2.90% | 2.98% |
| Rio | 2.02% | 2.39% | 2.75% | 2.94% | 3.04% |
| Saint Augustine | 1.85% | 2.36% | 2.59% | 2.71% | 2.78% |
| Victoria | 2.22% | 2.56% | 2.84% | 2.96% | 3.05% |
| Wataga | 2.03% | 2.36% | 2.63% | 2.74% | 2.76% |
| Williamsfield | 1.75% | 2.29% | 2.53% | 2.65% | 2.78% |
| Woodhull | 2.60% | 2.79% | 2.92% | 3.05% | 3.12% |
| Yates City | 2.38% | 2.69% | 2.87% | 3.04% | 3.08% |
| Alexis | N/A | N/A | N/A | N/A | N/A |
| Alpha | N/A | N/A | N/A | N/A | N/A |
| Delong | N/A | N/A | N/A | N/A | N/A |
| Elmwood | N/A | N/A | N/A | N/A | N/A |
| Henderson | N/A | N/A | N/A | N/A | N/A |
| North Henderson | N/A | N/A | N/A | N/A | N/A |
Source: Ownwell
Property Tax Assessment Values Across Knox County, Illinois
When examining property taxes in Knox County, understanding the distinction between "market value" and "assessed value" is crucial.
The market value is what a willing buyer would pay to a willing seller in an open and competitive market, often influenced by location, property condition, and economic market trends. The Knox County assessment office estimates the market value for tax purposes.
The assessed value is the market value minus any applicable exemptions or limits determined by local laws and offerings. The tax assessed value is the figure used to calculate your property taxes or the amount multiplied by your tax rate to get your tax bill.
Assessment notices are sent in the spring each year, and they typically reach your mailbox by the middle of the month. Each property owner receives an assessment notice that contains both the market value and assessed value, along with an estimate of your property tax bill.
The median tax bill in Knox County is $2,355, slightly below the national median property tax bill of $2,400. Tax bills vary widely across the county, from $1,158 in East Galesburg to $9,345 in Woodhull, where the median home price is $309,045.
Median Knox County Market Value
$93,540
Median Illinois Market Value
$227,888
Median United States Market Value
$235,294
Property Tax Assessment Values Across Knox County, Illinois
| City | 10th Percentile | 25th Percentile | Median Home Price | 75th Percentile | 90th Percentile |
|---|---|---|---|---|---|
| Abingdon | $15,030 | $42,570 | $68,880 | $147,720 | $253,164 |
| Altona | $62,064 | $128,722 | $203,445 | $325,432 | $480,783 |
| Dahinda | $67,212 | $105,525 | $157,260 | $375,540 | $688,950 |
| East Galesburg | $6,222 | $10,815 | $46,680 | $88,245 | $442,614 |
| Farmington | $93,774 | $115,440 | $188,730 | $202,170 | $434,208 |
| Galesburg | $8,760 | $13,740 | $40,710 | $79,620 | $186,096 |
| Galva | $79,362 | $115,800 | $172,230 | $237,705 | $347,436 |
| Gilson | $56,100 | $102,390 | $145,140 | $210,960 | $300,420 |
| Knoxville | $39,876 | $77,400 | $135,720 | $189,360 | $291,498 |
| La Fayette | $73,104 | $103,005 | $211,665 | $273,225 | $327,222 |
| London Mills | $23,778 | $76,305 | $106,200 | $223,020 | $278,220 |
| Maquon | $31,728 | $93,990 | $162,720 | $263,190 | $364,140 |
| Oneida | $74,238 | $98,730 | $181,785 | $282,682 | $411,597 |
| Rio | $60,432 | $97,350 | $184,470 | $315,150 | $416,430 |
| Saint Augustine | $61,737 | $105,968 | $204,435 | $325,860 | $414,084 |
| Victoria | $32,808 | $82,665 | $124,080 | $204,690 | $277,812 |
| Wataga | $58,134 | $106,462 | $155,640 | $239,385 | $339,873 |
| Williamsfield | $59,094 | $99,945 | $170,580 | $240,172 | $409,119 |
| Woodhull | $121,101 | $277,462 | $309,045 | $527,018 | $734,487 |
| Yates City | $103,356 | $155,370 | $238,380 | $340,440 | $439,212 |
| Alexis | N/A | N/A | N/A | N/A | N/A |
| Alpha | N/A | N/A | N/A | N/A | N/A |
| Delong | N/A | N/A | N/A | N/A | N/A |
| Elmwood | N/A | N/A | N/A | N/A | N/A |
| Henderson | N/A | N/A | N/A | N/A | N/A |
| North Henderson | N/A | N/A | N/A | N/A | N/A |
Source: Ownwell
Property Tax Bills Across Knox County, Illinois
Property tax bills in Knox County are based on the assessed value of a home, not its market price alone. Local taxing authorities apply the county’s tax rates to that assessed value, and the final bill reflects the mix of county, city, school, and other local levies. A homeowner with a higher assessed value or fewer exemptions will generally pay more, while a lower assessment can reduce the bill.
With a median home price of $93,540, Knox County homeowners can see very different outcomes depending on location and assessment. The 25th percentile tax bill is $990, while the 75th percentile is $5,090 and the 90th percentile reaches $8,889. That range shows how much tax bills can vary across the county. In Woodhull, the highest median tax bill is $9,345, while East Galesburg has the lowest median tax bill at $1,158. For homeowners, understanding how the bill is calculated can make a meaningful difference in planning and long-term housing costs.
Median Knox County Tax Bill
$2,355
Median Illinois Tax Bill
$5,277
Median United States Tax Bill
$2,400
Property Tax Bills Across Knox County, Illinois
| City | 10th Percentile | 25th Percentile | Median Tax Bill | 75th Percentile | 90th Percentile |
|---|---|---|---|---|---|
| Abingdon | $416 | $1,008 | $1,808 | $3,412 | $6,047 |
| Altona | $1,510 | $3,387 | $5,387 | $8,962 | $14,373 |
| Dahinda | $1,046 | $2,245 | $3,759 | $9,223 | $16,696 |
| East Galesburg | $154 | $268 | $1,158 | $2,190 | $11,202 |
| Farmington | $2,740 | $3,366 | $5,363 | $6,131 | $12,620 |
| Galesburg | $271 | $399 | $1,198 | $2,299 | $4,662 |
| Galva | $2,222 | $2,832 | $4,422 | $6,804 | $9,409 |
| Gilson | $1,356 | $2,526 | $3,648 | $5,538 | $7,928 |
| Knoxville | $831 | $1,832 | $2,984 | $4,643 | $7,316 |
| La Fayette | $1,840 | $2,598 | $5,997 | $8,326 | $10,373 |
| London Mills | $410 | $1,650 | $3,208 | $6,332 | $7,561 |
| Maquon | $749 | $2,137 | $4,472 | $7,130 | $10,037 |
| Oneida | $1,586 | $2,624 | $4,740 | $7,287 | $11,779 |
| Rio | $1,331 | $2,122 | $5,168 | $8,922 | $12,055 |
| Saint Augustine | $881 | $2,030 | $5,272 | $8,654 | $10,810 |
| Victoria | $902 | $1,876 | $3,451 | $5,584 | $7,597 |
| Wataga | $1,567 | $2,137 | $3,810 | $6,227 | $8,977 |
| Williamsfield | $1,046 | $2,166 | $3,972 | $6,100 | $10,507 |
| Woodhull | $3,610 | $8,263 | $9,345 | $15,402 | $21,099 |
| Yates City | $2,981 | $3,956 | $6,382 | $10,277 | $12,211 |
| Alexis | N/A | N/A | N/A | N/A | N/A |
| Alpha | N/A | N/A | N/A | N/A | N/A |
| Delong | N/A | N/A | N/A | N/A | N/A |
| Elmwood | N/A | N/A | N/A | N/A | N/A |
| Henderson | N/A | N/A | N/A | N/A | N/A |
| North Henderson | N/A | N/A | N/A | N/A | N/A |
Source: Ownwell
Don't miss the deadline to appeal!
Dates | |
|---|---|
| Appeal Deadline | July 1 |
Links | |
|---|---|
| Knox Tax Assessor | |
| Website | knoxil.devnetwedge.com |