Washington County, Illinois Property Taxes
Median Washington County effective property tax rate: 2.25%, significantly higher than the national median of 1.02%.
Median Washington County home value: $38,358
Median annual Washington County tax bill: $660, $1,740 lower than the national median property tax bill of $2,400.
How are property taxes in Washington County calculated?
Property taxes in Washington 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 Nashville or another part of Washington County, knowing local tax details benefits homeowners and investors.
Last Updated March 1, 2025
Washington County, Illinois Property Tax Bill Calculator
$100,000
$1,500,000
$3,000,000
Median Effective Tax Rate
2.25%
Estimate Property Tax Bill
$863
$801
Property Tax Rates Across Washington County, Illinois
Local government entities in Illinois set tax rates, and these can vary significantly across different counties. Annually, each county calculates its required budget to provide essential services and divides that by the total value of all taxable property within its jurisdiction, resulting in the property tax rate. Although votes and laws play a role in determining tax rates and budgets, this is essentially the annual process.
In Washington County, the effective property tax rate stands at 2.25%, which is notably higher than the national median of 1.02%. Within the county, Irvington has the highest median tax rate at 3.17%, while Addieville offers some relief with the lowest rate at 1.63%. These figures highlight the significant variation in tax rates even within a single county, reflecting the diverse financial needs and property values across different areas. Comparing Washington County's rate to the U.S. median property tax rate underscores the importance of understanding local tax dynamics and exploring potential appeal and exemption opportunities to manage property tax liabilities effectively.
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 Washington County Taxx Rate
2.25%
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 Taxx Rate
2.35%
Median Effective United States Tax Rate
0.99%
Property Tax Rates Across Washington County, Illinois
City | 10th Percentile | 25th Percentile | Median Tax Rate | 75th Percentile | 90th Percentile |
---|---|---|---|---|---|
Addieville | 0.58% | 1.03% | 1.63% | 2.22% | 2.60% |
Ashley | 1.21% | 1.72% | 2.42% | 2.90% | 2.90% |
Centralia | 1.24% | 1.96% | 2.14% | 3.37% | 3.81% |
Coulterville | 0.26% | 1.12% | 2.03% | 2.46% | 2.77% |
Du Bois | 1.08% | 1.84% | 2.80% | 2.80% | 2.80% |
Hoyleton | 1.23% | 1.55% | 2.65% | 2.65% | 2.92% |
Irvington | 0.49% | 1.67% | 3.17% | 3.17% | 3.17% |
Lenzburg | N/A | N/A | N/A | N/A | N/A |
Marissa | 0.76% | 1.26% | 2.19% | 2.94% | 2.95% |
Nashville | 1.29% | 1.78% | 2.64% | 2.97% | 3.05% |
Oakdale | 0.89% | 1.39% | 1.83% | 2.49% | 2.70% |
Okawville | 0.76% | 1.42% | 2.37% | 2.53% | 2.60% |
Radom | 1.77% | 2.20% | 2.90% | 2.90% | 3.01% |
Richview | 0.83% | 1.55% | 2.11% | 3.06% | 3.06% |
Venedy | N/A | N/A | N/A | N/A | N/A |
Source: Ownwell
Property Tax Assessment Values Across Washington County, Illinois
When examining property taxes in Washington 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 Washington County appraisal district 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 Washington County, assessment notices are sent in the spring each year. They’ll typically reach your mailbox by the middle of May. 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 Washington County. For example, the median tax bill in Washington County is $991.00, with tax bills ranging significantly across the county. Addieville has the highest median home price at $51,452.00.
Property Tax Assessment Values Across Washington County, Illinois
Source: Ownwell

$22,533
$36,993
$51,452
Median Washington County Assessed Value
$38,358
Median Illinois Assessed Value
$194,700
Median United States Assessed Value
$244,900
Property Tax Assessment Values Across Washington County, Illinois
City | 10th Percentile | 25th Percentile | Median Home Price | 75th Percentile | 90th Percentile |
---|---|---|---|---|---|
Addieville | $8,161 | $19,843 | $51,452 | $71,371 | $95,687 |
Ashley | $6,505 | $19,342 | $39,327 | $65,412 | $84,408 |
Centralia | $8,175 | $15,951 | $41,451 | $56,559 | $73,614 |
Coulterville | $7,732 | $23,823 | $41,910 | $86,871 | $125,060 |
Du Bois | $1,830 | $6,756 | $24,309 | $45,204 | $76,379 |
Hoyleton | $2,681 | $6,357 | $30,351 | $55,743 | $79,046 |
Irvington | $6,260 | $8,988 | $22,533 | $42,836 | $69,366 |
Lenzburg | N/A | N/A | N/A | N/A | N/A |
Marissa | $2,258 | $14,594 | $31,754 | $68,096 | $105,598 |
Nashville | $4,466 | $12,097 | $44,656 | $66,280 | $90,711 |
Oakdale | $4,773 | $21,084 | $50,430 | $70,320 | $85,170 |
Okawville | $5,110 | $11,344 | $36,174 | $61,668 | $79,706 |
Radom | $5,170 | $16,154 | $44,600 | $60,412 | $81,732 |
Richview | $6,239 | $15,872 | $38,266 | $58,762 | $74,897 |
Venedy | N/A | N/A | N/A | N/A | N/A |
Source: Ownwell
Property Tax Bills Across Washington County, Illinois
Median Washington County Tax Bill
$660
Median Illinois Tax Bill
$4,715
Median United States Tax Bill
$2,690
Property Tax Bills Across Washington County, Illinois
City | 10th Percentile | 25th Percentile | Median Tax Bill | 75th Percentile | 90th Percentile |
---|---|---|---|---|---|
Addieville | $128 | $254 | $665 | $1,228 | $1,838 |
Ashley | $128 | $302 | $753 | $1,252 | $1,755 |
Centralia | $199 | $540 | $991 | $1,297 | $1,584 |
Coulterville | $84 | $278 | $468 | $1,856 | $2,675 |
Du Bois | $45 | $137 | $423 | $994 | $1,514 |
Hoyleton | $70 | $155 | $601 | $1,086 | $1,416 |
Irvington | $146 | $193 | $294 | $833 | $1,347 |
Lenzburg | N/A | N/A | N/A | N/A | N/A |
Marissa | $65 | $145 | $401 | $1,164 | $4,043 |
Nashville | $159 | $326 | $830 | $1,378 | $2,198 |
Oakdale | $108 | $226 | $721 | $1,254 | $1,706 |
Okawville | $107 | $180 | $442 | $1,053 | $1,641 |
Radom | $150 | $357 | $857 | $1,728 | $1,810 |
Richview | $68 | $242 | $622 | $1,226 | $1,419 |
Venedy | N/A | N/A | N/A | N/A | N/A |
Source: Ownwell