Mercer County, Illinois Property Taxes

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

Median Mercer County effective property tax rate: 2.47%, significantly higher than the national median of 1.02%.
Median Mercer County home value: $156,489
Median annual Mercer County tax bill: $3,661, $1,261 higher than the national median property tax bill of $2,400.

How are property taxes in Mercer County calculated?

Property taxes in Mercer 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 Aledo or another part of Mercer County, knowing local tax details benefits homeowners and investors.

Last Updated March 1, 2025

Mercer County, Illinois Property Tax Bill Calculator

Property Assessed Value

$100,000

$1,500,000

$3,000,000

Median Effective Tax Rate

2.47%

Estimate Property Tax Bill

$3,865

$3,587

Ownwell’s Mercer County Property Tax Bill Calculator empowers homeowners, real estate investors, and potential buyers to estimate their annual property taxes in Mercer County with just two data points. By entering your property's estimated assessed value, our calculator applies Mercer 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 Mercer County. With Mercer County's property tax rate and bill typically below the national median, residents often enjoy more favorable tax conditions. For those interested in more localized information, please scroll down to explore city-level trends!

Property Tax Rates Across Mercer County, Illinois

Local government entities set tax rates, which can vary widely within a state. This is because annually, each county estimates its required budget to provide services and divides that by the total value of all taxable property within its jurisdiction. This calculation results in the property tax rate. While there are votes and laws involved in setting tax rates and budgets, in a nutshell, this is the annual process. Below, you can compare Mercer County's effective property tax rate to other counties in Illinois or the U.S. median property tax rate. Mercer County has a median property tax rate of 2.47%, significantly higher than the national median of 1.02%. Within Illinois, Seaton has the highest median tax rate at 2.75%, while Illinois City stands at the lower end with a rate of 2.25%. The higher rates in Mercer County reflect the local government's budgetary needs and the valuation of the taxable property within its jurisdiction. Understanding these differences can help property owners make informed decisions about their investments and potential savings through appeals or exemptions.

Property Tax Rates Across Mercer County, Illinois

Source: Ownwell

2.25%

2.50%

2.75%

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 Mercer County Tax Rate

2.47%

Median Effective Illinois Tax Rate

2.35%

Median Effective United States Tax Rate

1.02%

Property Tax Rates Across Mercer County, Illinois

City	10th Percentile	25th Percentile	Median Tax Rate	75th Percentile	90th Percentile
Aledo	1.88%	2.25%	2.55%	2.67%	2.76%
Alexis	2.03%	2.22%	2.43%	2.47%	2.51%
Illinois City	1.87%	2.04%	2.25%	2.41%	2.47%
Joy	2.18%	2.42%	2.58%	2.68%	2.74%
Keithsburg	2.03%	2.36%	2.42%	2.69%	2.75%
Lynn Center	1.22%	2.03%	2.31%	2.61%	2.62%
Matherville	1.91%	2.18%	2.26%	2.50%	2.62%
New Boston	1.92%	2.23%	2.48%	2.66%	2.66%
New Windsor	1.58%	2.03%	2.33%	2.52%	2.53%
North Henderson	1.95%	2.28%	2.40%	2.42%	2.51%
Reynolds	2.00%	2.25%	2.51%	2.64%	2.67%
Seaton	2.46%	2.63%	2.75%	2.76%	2.76%
Sherrard	1.58%	2.17%	2.38%	2.53%	2.62%
Viola	1.67%	2.15%	2.42%	2.62%	2.64%
Milan	N/A	N/A	N/A	N/A	N/A
Orion	N/A	N/A	N/A	N/A	N/A
Preemption	N/A	N/A	N/A	N/A	N/A
Rio	N/A	N/A	N/A	N/A	N/A

Source: Ownwell

Property Tax Assessment Values Across Mercer County, Illinois

When examining property taxes in Mercer 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 Mercer 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 Mercer 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 Mercer County. For example, the median tax bill in Mercer County is $3,513, with tax bills ranging significantly across the county. Reynolds has the highest median home price at $213,783.

Property Tax Assessment Values Across Mercer County, Illinois

Source: Ownwell

$90,765

$152,274

$213,783

Median Mercer County Market Value

$156,489

Median Illinois Market Value

$194,700

Median United States Market Value

$235,294

Property Tax Assessment Values Across Mercer County, Illinois

City	10th Percentile	25th Percentile	Median Home Price	75th Percentile	90th Percentile
Aledo	$38,098	$84,195	$154,762	$263,563	$381,887
Alexis	$58,712	$115,222	$177,704	$306,503	$444,498
Illinois City	$126,510	$151,426	$176,670	$264,048	$352,305
Joy	$43,283	$121,138	$180,218	$284,169	$426,834
Keithsburg	$14,614	$60,585	$116,378	$188,366	$278,574
Lynn Center	$14,672	$83,198	$161,247	$220,098	$305,044
Matherville	$36,994	$61,575	$90,765	$198,897	$249,387
New Boston	$31,363	$65,300	$142,530	$220,448	$328,089
New Windsor	$26,733	$76,704	$121,815	$203,526	$302,741
North Henderson	$66,024	$107,948	$193,590	$310,691	$377,005
Reynolds	$78,376	$129,964	$213,783	$294,422	$396,565
Seaton	$31,335	$116,406	$210,810	$325,658	$472,221
Sherrard	$38,391	$82,560	$156,156	$244,579	$312,290
Viola	$40,943	$81,896	$148,326	$225,754	$275,318
Milan	N/A	N/A	N/A	N/A	N/A
Orion	N/A	N/A	N/A	N/A	N/A
Preemption	N/A	N/A	N/A	N/A	N/A
Rio	N/A	N/A	N/A	N/A	N/A

Source: Ownwell

Property Tax Bills Across Mercer County, Illinois

In Mercer County, IL, property tax bills are calculated based on the assessed value of a home, which is a percentage of its market value. Local taxing authorities determine the assessment rate, and the property tax rate is applied to this assessed value. Several factors influence the tax bill, including the property's location, size, and any applicable exemptions. The median home price in Mercer County is $156,489, which results in varying tax bills across the region. For example, the tax bill at the 25th percentile is $1,921, while at the 75th percentile, it reaches $6,076. Homeowners in Seaton face the highest median tax bill of $5,808, whereas those in Matherville enjoy the lowest at $1,712. Compared to the national median property tax rate of 1.02% and a median tax bill of $2,400, Mercer County's tax bills reflect both higher and lower ends of the spectrum, affecting homeowners' financial planning and the affordability of homeownership in the region.

Property Tax Bills Across Mercer County, Illinois

Source: Ownwell

$1,712

$3,760

$5,808

Median Mercer County Tax Bill

$3,661

Median Illinois Tax Bill

$4,715

Median United States Tax Bill

$2,400

Property Tax Bills Across Mercer County, Illinois

City	10th Percentile	25th Percentile	Median Tax Bill	75th Percentile	90th Percentile
Aledo	$926	$1,988	$3,707	$6,517	$9,906
Alexis	$1,260	$2,580	$3,969	$7,158	$10,836
Illinois City	$2,234	$2,826	$3,577	$6,100	$8,163
Joy	$1,427	$3,037	$4,428	$7,000	$10,873
Keithsburg	$453	$1,457	$2,779	$4,730	$7,234
Lynn Center	$385	$763	$3,211	$4,480	$7,123
Matherville	$956	$1,397	$1,712	$4,396	$5,488
New Boston	$772	$1,605	$3,308	$5,574	$8,202
New Windsor	$629	$1,469	$2,713	$4,312	$6,732
North Henderson	$869	$2,660	$4,552	$7,201	$8,980
Reynolds	$1,674	$2,884	$4,763	$7,403	$9,822
Seaton	$1,036	$2,922	$5,808	$8,606	$12,168
Sherrard	$715	$1,690	$3,143	$5,622	$7,250
Viola	$783	$1,759	$3,140	$5,168	$6,713
Milan	N/A	N/A	N/A	N/A	N/A
Orion	N/A	N/A	N/A	N/A	N/A
Preemption	N/A	N/A	N/A	N/A	N/A
Rio	N/A	N/A	N/A	N/A	N/A

Source: Ownwell

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