Williamson County, Illinois Property Taxes

Name: Property Tax Bills Across Williamson County, Illinois
Creator: Ownwell
License: https://creativecommons.org/licenses/by-nc/4.0/

Median Williamson County effective property tax rate: 2.30%, significantly higher than the national median of 1.02%.
Median Williamson County home value: $85,800
Median annual Williamson County tax bill: $1,802, $598 lower than the national median property tax bill of $2,400.

How are property taxes in Williamson County calculated?

Property taxes in Williamson 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 your county's property tax system, exemptions, and reduction opportunities can lead to significant savings. Whether you live in Marion or another part of Williamson County, knowing local tax details benefits homeowners and investors.

Last Updated March 1, 2025

Williamson County, Illinois Property Tax Bill Calculator

Property Assessed Value

$100,000

$1,500,000

$3,000,000

Median Effective Tax Rate

2.3%

Estimate Property Tax Bill

$1,973

$1,831

Ownwell’s Williamson County Property Tax Bill Calculator empowers homeowners, real estate investors, and potential buyers to estimate their annual property taxes in Williamson County with just two data points. By entering your property's estimated assessed value, our calculator applies Williamson County’s median effective tax rate to accurately estimate your property tax bill. Note that your property's assessed value — determined by your county — reflects any exemptions you may have, ensuring a more precise calculation for your property tax obligations. This insightful tool helps you understand potential tax liabilities and highlights how Ownwell can assist in reducing property taxes in Williamson County. For those interested in more localized information, please scroll down to explore city-level trends!

Property Tax Rates Across Williamson County, Illinois

Local government entities set tax rates, which can vary widely within a state due to differing budgetary needs and property values. Each year, counties like Williamson in Illinois estimate their required budget to provide essential services. This budget is then divided by the total value of all taxable property within the county, resulting in the effective property tax rate. Although laws and votes play a role in this process, the essence remains the same annually. Williamson County's effective property tax rate stands out compared to both other counties in Illinois and the U.S. median property tax rate of 1.02%. With a rate higher than the national median, property owners in Williamson County may find their tax bills more substantial. For instance, the median property tax rate in Williamson County is 2.30%, with Herrin having the highest rate of 2.59% and West Frankfort the lowest at 1.88%. This illustrates the variation even within the county, highlighting the importance of understanding local tax dynamics.

Property Tax Rates Across Williamson County, Illinois

Source: Ownwell

1.88%

2.24%

2.59%

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 Williamson County Tax Rate

2.30%

Median Effective Illinois Tax Rate

2.35%

Median Effective United States Tax Rate

1.02%

Property Tax Rates Across Williamson County, Illinois

City	10th Percentile	25th Percentile	Median Tax Rate	75th Percentile	90th Percentile
Cambria	0.93%	1.54%	2.33%	2.63%	2.63%
Carbondale	1.49%	2.07%	2.39%	2.52%	2.62%
Carrier Mills	1.50%	1.90%	2.18%	2.37%	2.37%
Carterville	1.56%	2.01%	2.30%	2.50%	2.63%
Colp	0.73%	1.41%	2.28%	2.34%	2.34%
Creal Springs	1.33%	1.95%	2.34%	2.60%	3.28%
De Soto	0.91%	1.50%	2.34%	2.47%	2.47%
Energy	1.21%	1.74%	2.17%	2.53%	2.53%
Freeman Spur	0.76%	1.29%	1.99%	2.60%	2.60%
Goreville	1.46%	2.10%	2.52%	2.60%	2.60%
Herrin	1.38%	2.03%	2.59%	2.99%	2.99%
Hurst	0.75%	1.27%	2.08%	2.52%	2.52%
Johnston City	1.02%	1.61%	2.12%	2.82%	2.82%
Makanda	1.54%	1.98%	2.44%	2.82%	2.82%
Marion	1.43%	1.89%	2.24%	2.47%	2.47%
Pittsburg	1.10%	1.66%	2.11%	2.39%	2.63%
Stonefort	1.01%	1.60%	2.12%	2.37%	2.49%
Thompsonville	1.42%	1.90%	2.37%	2.39%	2.43%
West Frankfort	1.15%	1.60%	1.88%	2.34%	2.34%
Galatia	N/A	N/A	N/A	N/A	N/A
Highland	N/A	N/A	N/A	N/A	N/A
New Burnside	N/A	N/A	N/A	N/A	N/A

Source: Ownwell

Property Tax Assessment Values Across Williamson County, Illinois

When examining property taxes in Williamson 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 Williamson County Assessor's 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: In Williamson County, assessment notices are sent in the spring each year. They’ll typically reach your mailbox by the middle of April. 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. By providing insights into how assessed and market values are determined, this section helps property owners navigate their tax responsibilities and understand the valuation processes affecting their property taxes in Williamson County. For example, the median tax bill in Williamson County is $1,676, with tax bills ranging significantly across the county. Carterville has the highest median home price at $119,430.

Property Tax Assessment Values Across Williamson County, Illinois

Source: Ownwell

$23,550

$71,490

$119,430

Median Williamson County Market Value

$85,800

Median Illinois Market Value

$194,700

Median United States Market Value

$235,294

Property Tax Assessment Values Across Williamson County, Illinois

City	10th Percentile	25th Percentile	Median Home Price	75th Percentile	90th Percentile
Cambria	$5,190	$24,398	$47,715	$75,615	$124,905
Carbondale	$5,259	$25,762	$86,235	$182,438	$248,607
Carrier Mills	$20,664	$43,890	$111,885	$172,035	$262,650
Carterville	$33,936	$66,450	$119,430	$188,040	$263,532
Colp	$3,102	$6,570	$23,550	$46,800	$75,348
Creal Springs	$14,970	$37,260	$87,720	$157,830	$222,507
De Soto	$4,953	$16,695	$33,315	$67,192	$125,637
Energy	$29,028	$66,570	$100,095	$138,968	$203,754
Freeman Spur	$4,257	$15,690	$31,230	$54,712	$87,144
Goreville	$14,526	$38,512	$103,845	$145,800	$259,140
Herrin	$25,764	$44,798	$69,240	$120,562	$187,119
Hurst	$4,446	$21,420	$36,450	$53,550	$82,194
Johnston City	$15,630	$34,770	$54,015	$93,922	$146,535
Makanda	$11,526	$41,205	$79,395	$125,355	$170,733
Marion	$30,333	$59,160	$103,590	$176,730	$256,707
Pittsburg	$11,640	$33,472	$68,820	$127,800	$189,142
Stonefort	$19,230	$32,730	$63,660	$113,190	$179,325
Thompsonville	$12,093	$35,914	$80,385	$132,544	$193,727
West Frankfort	$16,824	$48,232	$96,195	$154,241	$222,864
Galatia	N/A	N/A	N/A	N/A	N/A
Highland	N/A	N/A	N/A	N/A	N/A
New Burnside	N/A	N/A	N/A	N/A	N/A

Source: Ownwell

Property Tax Bills Across Williamson County, Illinois

In Williamson County, IL, property tax bills are determined based on the assessed value of a home, which is a percentage of its market value. The median home price in the county is $85,800, and homeowners can expect to pay taxes relative to this valuation. Tax bills vary significantly within the county, with the 25th percentile at $910 and the 75th percentile reaching $3,437, illustrating the range in property assessments and tax obligations. The 90th percentile sees tax bills as high as $5,440, highlighting the potential financial impact on homeowners with higher-valued properties. Carterville reports the highest median tax bill at $2,611, whereas Colp has the lowest at $345. Compared to the national median property tax rate of 1.02% and a median bill of $2,400, Williamson County presents a diverse tax landscape. These taxes fund essential local services, such as education and public safety, directly affecting the quality of life and property values within the community.

Property Tax Bills Across Williamson County, Illinois

Source: Ownwell

$345

$1,478

$2,611

Median Williamson County Tax Bill

$1,802

Median Illinois Tax Bill

$4,715

Median United States Tax Bill

$2,400

Property Tax Bills Across Williamson County, Illinois

City	10th Percentile	25th Percentile	Median Tax Bill	75th Percentile	90th Percentile
Cambria	$119	$380	$840	$1,542	$3,014
Carbondale	$100	$547	$1,820	$4,000	$5,818
Carrier Mills	$479	$891	$2,238	$3,899	$5,536
Carterville	$587	$1,335	$2,611	$4,401	$6,306
Colp	$56	$115	$345	$812	$1,476
Creal Springs	$275	$752	$1,833	$3,562	$5,189
De Soto	$83	$216	$639	$1,302	$2,633
Energy	$441	$1,145	$2,036	$3,050	$4,831
Freeman Spur	$68	$222	$474	$965	$1,927
Goreville	$324	$769	$2,298	$3,423	$7,086
Herrin	$429	$941	$1,630	$2,984	$5,047
Hurst	$76	$257	$554	$1,022	$1,540
Johnston City	$201	$548	$1,128	$1,977	$3,112
Makanda	$332	$895	$1,765	$2,970	$4,146
Marion	$532	$1,154	$2,115	$3,868	$5,912
Pittsburg	$190	$583	$1,250	$2,518	$4,164
Stonefort	$220	$554	$1,121	$2,074	$3,893
Thompsonville	$277	$707	$1,500	$2,909	$4,287
West Frankfort	$218	$694	$1,666	$2,915	$4,349
Galatia	N/A	N/A	N/A	N/A	N/A
Highland	N/A	N/A	N/A	N/A	N/A
New Burnside	N/A	N/A	N/A	N/A	N/A

Source: Ownwell

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