Williamson County, Illinois
Property Taxes
The average property tax rate in Williamson County, Illinois is 1.72%. On the county's median home value of $156,400, that works out to $2,690 per year in property taxes, the 582nd highest bill of all 3,211 counties nationally. The next deadline to protest your Williamson County property tax assessment is within 30 days of your county's published assessment list.
Williamson County, Illinois Property Tax Calculator
How the Calculator Works
This Williamson County, IL property tax calculator estimates your bill the same way the Williamson County Supervisor of Assessments does: your home's value multiplied by the local effective tax rate. The Williamson County effective property tax rate is 1.72%, compared with the Illinois average of 2.01% and the U.S. average of 0.94%. On the county's median home value of $156,400, that works out to roughly $2,690 a year in Williamson County property taxes. Use the estimate above as a starting point, then check the protest playbook below if your county's assessed value looks higher than your calculator estimate suggests it should.
Lower Your Williamson County, Illinois Property Taxes
Step 1: Check
Your TimelineIn Williamson County, your assessment notice arrives in your county's reassessment year, and the deadline to appeal it is . It is free to file!
- Notice arrives
- your county's reassessment year
- Appeal deadline
- Filing fee
- free
Step 2: Gather
Your EvidenceTo file a strong appeal in Williamson County, you need proof. Gather these four things before you begin to file.
- Look up your current assessed property value
- Research recent sales of similar properties in your area
- Download the required form:
Board of Review assessment complaint form - Take photos of any property issues that affect value
Step 3: Submit
Your AppealAppeals in Williamson County are filed with the Williamson County Board of Review. View filing instructions
- File with
- Williamson County Board of Review
- Appeal form
- Board of Review assessment complaint form
| Doing it yourself | With Abode | |
|---|---|---|
| Cost | Free | $99/yr flat |
| Time investment | 6-10 hrs (research + filing) | 3 min (enrollment only) |
| Comparable sales | You pull the sales yourself | Automated comp analysis included |
| Evidence formatting | You gather and format it | Professional evidence packet included |
| Filing process | You file the Board of Review assessment complaint form yourself | We file it for you |
| Hearing preparation | You appear before the review board | Consultant appears on your behalf |
| Success rate | 40-60% | 88% |
Lower your property tax in minutes with Abode Money
Williamson County, Illinois Property Tax Rate
The typical Williamson County homeowner pays an effective rate of 1.72% of market value each year, below the Illinois median of 2.01% and well above the U.S. median of 0.94%. By city the median rate runs from 0.75% in Pittsburg to 2.48% in Carbondale. The table lists the 25th, median, and 75th percentile effective rate for all 18 Williamson County cities.
| City | 25th percentile | Median | 75th percentile |
|---|---|---|---|
| Blairsville | 1.13% | 1.36% | 1.43% |
| Bush | 0.78% | 1.05% | 1.15% |
| Cambria | 1.07% | 1.29% | 1.53% |
| Carbondale | 2.14% | 2.48% | 2.80% |
| Carterville | 1.79% | 2.05% | 2.41% |
| Colp | 1.59% | 1.72% | 1.91% |
| Crainville | 1.46% | 1.72% | 1.89% |
| Creal Springs | 1.63% | 1.73% | 2.10% |
| Energy | 1.56% | 1.72% | 1.96% |
| Freeman Spur | 0.97% | 1.11% | 1.24% |
| Herrin | 1.49% | 1.82% | 2.10% |
| Hurst | 1.29% | 1.66% | 1.95% |
| Johnston City | 1.59% | 1.84% | 2.06% |
| Marion | 1.50% | 1.74% | 2.03% |
| Pittsburg | 0.58% | 0.75% | 0.87% |
| Spillertown | 1.00% | 1.23% | 1.28% |
| Crab Orchard | - | - | - |
| Stonefort | - | - | - |
A dash means the Census withholds a figure this rate is worked out from: it does not publish a bill above $10,001 or a home value above $2,000,001. The 25th and 75th percentile rates are an Abode Money estimate, modelled from each city’s own home-value quartiles. The median is the city’s published effective rate.
Williamson County, Illinois Property Tax Bill
On a median home value of $156,400, the typical Williamson County tax bill comes to $2,690 a year, well below the Illinois median of $5,298 and below the U.S. median of $3,119. Bills scale with value, so they track the map of where the expensive homes are. By city the median bill runs from $675 in Freeman Spur to $4,042 in Carterville. Search all 18 Williamson County cities below to compare the 25th, median, and 75th percentile bill.
| City | 25th percentile | Median | 75th percentile |
|---|---|---|---|
| Blairsville | $1,436 | $2,466 | $2,882 |
| Bush | $342 | $820 | $1,078 |
| Cambria | $1,061 | $1,860 | $3,023 |
| Carbondale | $2,064 | $3,166 | $4,550 |
| Carterville | $2,727 | $4,042 | $6,505 |
| Colp | $941 | $1,194 | $1,613 |
| Crainville | $1,981 | $3,183 | $4,212 |
| Creal Springs | $808 | $968 | $1,709 |
| Energy | $1,942 | $2,618 | $3,834 |
| Freeman Spur | $446 | $675 | $916 |
| Herrin | $1,149 | $2,059 | $3,160 |
| Hurst | $548 | $1,136 | $1,832 |
| Johnston City | $1,063 | $1,620 | $2,249 |
| Marion | $1,760 | $2,761 | $4,299 |
| Pittsburg | $456 | $973 | $1,501 |
| Spillertown | $1,008 | $1,875 | $2,106 |
| Crab Orchard | - | $1,852 | - |
| Stonefort | - | - | - |
A dash means the Census withholds that bill. It does not publish a bill above $10,001.
Williamson County, Illinois Home Values
The median Williamson County home is worth $156,400, the value your tax bill is calculated from, versus an Illinois median of $263,300 and a U.S. median of $332,700. Values range widely, with the middle half of Williamson County homes between $93,500 and $252,700. By city the median value runs from $55,800 in Creal Springs to $197,100 in Carterville. The table lists the 25th, median, and 75th percentile value for all 18 cities.
| City | 25th percentile | Median | 75th percentile |
|---|---|---|---|
| Blairsville | $105,700 | $181,500 | $212,100 |
| Bush | $32,500 | $78,000 | $102,500 |
| Cambria | $82,000 | $143,800 | $233,700 |
| Carbondale | $83,400 | $127,900 | $183,800 |
| Carterville | $133,000 | $197,100 | $317,200 |
| Colp | $54,600 | $69,300 | $93,600 |
| Crainville | $115,300 | $185,300 | $245,200 |
| Creal Springs | $46,600 | $55,800 | $98,500 |
| Energy | $112,600 | $151,800 | $222,300 |
| Freeman Spur | $40,000 | $60,600 | $82,200 |
| Herrin | $63,200 | $113,300 | $173,900 |
| Hurst | $33,100 | $68,600 | $110,600 |
| Johnston City | $57,800 | $88,100 | $122,300 |
| Marion | $100,900 | $158,300 | $246,500 |
| Pittsburg | $60,600 | $129,200 | $199,300 |
| Spillertown | $82,000 | $152,500 | $171,300 |
| Stonefort | $41,300 | $65,700 | $122,700 |
| Crab Orchard | $78,800 | - | $165,300 |
A dash means the Census withholds that value. It does not publish a home value above $2,000,001.
Williamson County, Illinois Property Tax History
Effective tax rate, median annual bill, and median home value in Williamson County, tracked year by year. Across the published years the median annual bill rose 36.2%, the median home value rose 29.4%, and the effective tax rate rose 5.3%.
Solid years are published figures. Dashed years are Abode predictions, from each county's own past trend.
| Tax year | Effective rate | Rate change | Median bill | Bill change | Median home value | Value change |
|---|---|---|---|---|---|---|
| 2020 | 1.63% | - | $1,975 | - | $120,900 | - |
| 2021 | 1.71% | +4.43% | $2,146 | +8.66% | $125,800 | +4.05% |
| 2022 | 1.68% | -1.79% | $2,337 | +8.90% | $139,500 | +10.89% |
| 2023 | 1.71% | +2.08% | $2,490 | +6.55% | $145,600 | +4.37% |
| 2024 | 1.72% | +0.57% | $2,690 | +8.03% | $156,400 | +7.42% |
| 2025(predicted) | 1.74% | +1.30% | $2,906 | +8.03% | $166,797 | +6.65% |
| 2026(predicted) | 1.76% | +1.29% | $3,139 | +8.02% | $177,886 | +6.65% |
Williamson County, Illinois vs. Nearby Counties
Thinking of moving? Run the tax math first. Of the six counties bordering Williamson County, five tax the same home for less. Move a $156,400 home into Pope County, the cheapest neighbor, and the bill falls $1,084 a year, while Jackson County, the most expensive, costs $187 more. Bordering effective rates run from 1.03% to 1.84% against Williamson County’s 1.72%. None of the five largest Illinois metro counties taxes the same home for less: Williamson has the lowest effective rate of the group. The widest gap across the county line is $1,271 a year.
Williamson County vs. Its Neighboring Counties
Effective rate, median bill, and the tax on the same $156,400 home · Williamson County and its six bordering counties
| County | Effective rate | Their median bill | Same home here | vs. Williamson |
|---|---|---|---|---|
| Williamson County | 1.72% | $2,690 | $2,690 | - |
| Franklin County | 1.57% | $1,394 | $2,450 | -$240/yr |
| Jackson County | 1.84% | $2,526 | $2,877 | +$187/yr |
| Johnson County | 1.24% | $1,992 | $1,941 | -$749/yr |
| Pope County | 1.03% | $1,477 | $1,606 | -$1,084/yr |
| Saline County | 1.69% | $1,597 | $2,649 | -$41/yr |
| Union County | 1.30% | $1,712 | $2,033 | -$657/yr |
Williamson County vs. the Big Illinois Metros
Effective rate, median bill, and the tax on the same $156,400 home · Illinois’s five largest metro counties
| County | Effective rate | Their median bill | Same home here | vs. Williamson |
|---|---|---|---|---|
| Cook County | 1.91% | $6,191 | $2,984 | +$294/yr |
| DuPage County | 2.05% | $8,007 | $3,200 | +$510/yr |
| Kane County | 2.26% | $7,382 | $3,531 | +$841/yr |
| Lake County | 2.58% | $8,923 | $4,037 | +$1,347/yr |
| Will County | 2.24% | $7,173 | $3,510 | +$820/yr |
Williamson County, Illinois Property Tax Exemptions
There are 7 property tax exemptions available in Williamson County, Illinois. What each saves depends on your own assessed value and local rate, so no fixed yearly figure is shown.
| Exemption | What you get | Saves a year | When to file |
|---|---|---|---|
| General Homestead Exemption (GHE)Owner-occupants who use the residential property as their principal dwelling and are liable for the property taxes. | Reduces EAV by up to $6,000 in all counties other than Cook (Cook is $10,000 and counties contiguous to Cook are $8,000). | Varies | File with the county Chief County Assessment Office / Supervisor of Assessments; in many counties it auto-renews once granted. |
| Senior Citizens Homestead ExemptionOwner-occupants age 65 or older who are liable for the property taxes on their principal residence. | Reduces EAV by $5,000 in all counties other than Cook (Cook and contiguous counties: $8,000). | Varies | File Form PTAX-324 with the Chief County Assessment Office; many counties auto-renew once granted. |
| Low-income Senior Citizens Assessment Freeze Homestead Exemption (Senior Freeze)Owner-occupants age 65 or older whose total household income is at or below the annual limit and who have owned/occupied the residence for the required period. | Freezes the property's EAV at the base-year value so it does not rise with inflation; the current household income maximum is $75,000 or less for taxable year 2026 (rising to $77,000 for 2027 and $79,000 for 2028 and after). | Varies | File Form PTAX-340 annually with the Chief County Assessment Office. |
| Homestead Exemption for Persons with DisabilitiesOwner-occupants with a qualifying disability who use the property as their principal residence. | Reduces EAV by $2,000 per year. | Varies | File initial Form PTAX-343 (with proof of disability) with the Chief County Assessment Office, then renew each year with Form PTAX-343-R. |
| Standard Homestead Exemption for Veterans with Disabilities (SHEVD)Veterans (or their surviving spouses) with a service-connected disability of at least 30% certified by the U.S. Department of Veterans Affairs, on a principal residence with total EAV under $250,000. | Reduces EAV by $2,500 for a 30% to under 50% disability, by $5,000 for a 50% to under 70% disability, and fully exempts the residential property from taxation for a 70% or greater disability. | Varies | File Form PTAX-342 with the Chief County Assessment Office and renew annually with Form PTAX-342-R. |
| Returning Veterans' Homestead ExemptionVeterans returning from active duty in an armed conflict involving the U.S. Armed Forces, on their principal residence. | Reduces EAV by $5,000, applied for two consecutive tax years beginning with the year the veteran returns. | Varies | File Form PTAX-341 with the Chief County Assessment Office for the year of return. |
| Homestead Improvement ExemptionOwner-occupants who make improvements to or rebuild an existing single-family residence that increase its value. | Exempts the added value from new improvements, up to an annual maximum of $75,000 in fair cash value (about $25,000 in EAV), for four years after completion. | Varies | Generally applied automatically by the township/county assessor upon reassessment; confirm with the Chief County Assessment Office. |
Williamson County, Illinois Cheat Sheet
Value, rate, bill, rank, and the protest and payment dates · every figure the sections above establish, restated as label and value · Williamson County, Illinois
| Median tax bill | $2,690 a year+8.0% year over year |
|---|---|
| Effective tax rate | 1.72%of market value · Illinois 2.01% · U.S. 0.94% |
| Median home value | $156,400the value your bill is calculated from |
| Middle half of homes | $93,500 – $252,70025th to 75th percentile home value |
| National rank | 582nd highestmedian bill, of 3,211 U.S. counties |
| Change since 2020 | +36.2%median bill, $1,975 to $2,690 |
| Effective rate since 2020 | +5.3%percent change in the rate, not percentage points |
| Cheapest neighbor | Pope County$1,084 a year less on the same $156,400 home |
| Who values your home | Williamson County Supervisor of Assessmentsmarket value as of the assessment date |
| Notice arrives | Your county's reassessment yearNotice of your proposed assessed value, mailed when your county reassesses property |
| Protest window | Within 30 days of your county's published assessment listBoard of Review assessment complaint form · free to file · Williamson County Board of Review |
| Protest odds | 88% win a reductionwith Abode Money · we build the evidence, file, and argue it for you |
| Payment due | In two installments a year, with due dates set by each county1.5% per month on each unpaid installment until it is paid (35 ILCS 200/21-15) |
Statistics here come from the U.S. Census Bureau’s American Community Survey: what owners report their home is worth and what they paid in tax. They are not assessment roll figures, so they will not match your notice. Nothing here is tax advice.
Williamson County, Illinois Property Tax FAQ
Straight answers about property taxes in Williamson County, Illinois: the effective rate and typical bill, when taxes are due, the protest deadline, whether an appeal is worth filing, what evidence wins a reduction, and how Abode lowers your bill every year.
The effective property tax rate in Williamson County is 1.72%. The typical homeowner pays $2,690 a year on a median home value of $156,400.
Williamson County property taxes are due in two installments a year, with due dates set by each county. Bills are issued as a single annual bill each spring by the county Collector, one year in arrears, and late payments are charged 1.5% per month on each unpaid installment until it is paid (35 ILCS 200/21-15). Due dates shift year to year, so confirm the current one with the tax office.
Usually yes. A protest backed by comparable sales or evidence of condition problems stands a real chance of a reduction, and most are settled at an informal review without a hearing. A lower value also becomes the starting point for the following year, so a single win keeps paying. Filing in Williamson County is free, and your value cannot be raised because you protested.
The strongest evidence is recent sales of comparable homes: three to five from the past year, nearby, and similar in size, age, and condition. Photos and repair estimates for condition problems help too, because the assessor values homes from the outside. Budget about 2-4 hrs to assemble it.
Abode protests your Williamson County assessment every year for $99/yr flat and wins a reduction 88% of the time. Doing it yourself is free but takes 6-10 hrs and wins 40-60% of the time.
Every house on this street pays a different bill.
Make sure yours is the right one. Abode checks your assessment, files your exemptions, and protests when the numbers are off.
