Will County, IL Property Tax: $6,993/yr (2026)
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The effective property tax rate in Will County is 2.35% of assessed home value. On a home at the county median value of $298,000, that works out to about $7,003 per year, or $584 per month. Will County is located in northeastern Illinois, and is home to approximately 698,450 residents.
About Will County
Will County covers approximately 835.9 square miles in Illinois. The county is home to about 698,450 residents living in roughly 252,684 housing units, of which 78.8% are owner-occupied. The median household income is $107,799, and the median home was built in 1992.
Will County borders Cook County, DuPage County, Grundy County, Kankakee County, Kendall County — useful comparisons if you're considering nearby areas with potentially different tax rates.
How Property Taxes Work in Illinois
Property taxes in Illinois are administered at the county level. Each county sets a millage rate applied to the assessed value of real property — the effective rate above accounts for any partial assessments and exemptions already built into the local tax base. Assessed value can differ meaningfully from current market value depending on how often the county reassesses and what fraction of market value it uses.
Most counties in Illinois offer exemptions that reduce the taxable assessed value: homestead exemptions for primary residences, senior exemptions, disability exemptions, and veteran exemptions are common. These reduce your effective rate below the county-wide average shown here. Contact the Will County Assessor's office to learn which exemptions apply to your property and when to file.
Will County vs. Neighboring Counties
| Location | Eff. Rate | Median Home | Annual Tax |
|---|---|---|---|
| Will County, IL | 2.35% | $298,000 | $7,003 |
| Illinois state average | 1.83% | — | $5,453* |
| Cook County | 1.98% | $305,200 | $6,053 |
| DuPage County | 2.09% | $374,100 | $7,833 |
| Grundy County | 2.03% | $259,200 | $5,260 |
| Kankakee County | 2.22% | $185,700 | $4,125 |
| Kendall County | 2.53% | $298,900 | $7,556 |
| US national average | 1.10% | $281,900 | $3,101 |
*State average annual tax computed at Will County's median home value of $298,000. Source: US Census ACS 2023 5-year estimates.
Frequently Asked Questions
How does Will County's property tax rate compare to the rest of Illinois?
At 2.35%, Will County is higher than the Illinois state average of 1.83%. On a home at the county median of $298,000, that means about $7,003 per year — versus $5,453 at the state average rate, a difference of $1,550 per year. Compared to the national average of 1.10%, Will County is above average.
What's a typical annual property tax bill in Will County?
For a home at the county median value of $298,000, the annual property tax in Will County is approximately $7,003 — or about $584 per month. For a home worth $447,000, expect around $10,505 per year. For a $596,000 home, approximately $14,006 per year. Use the calculator above to estimate taxes for any assessed value.
Where do I appeal a Will County property tax assessment?
Property assessment appeals in Will County are handled by the Will County Assessor's office. Most jurisdictions require filing within 30–90 days of receiving your assessment notice — confirm the specific deadline with the assessor's office before submitting, as deadlines and procedures vary by county. A successful appeal can reduce your assessed value and lower your tax bill for the current and future tax years.
What exemptions are available in Will County?
Illinois counties commonly offer homestead exemptions for owner-occupied primary residences, senior citizen exemptions for qualifying homeowners aged 65 and older, exemptions for disabled residents, and veterans' exemptions. Each exemption reduces your assessed taxable value, which in turn reduces your effective tax rate below the county-wide 2.35% shown here. Contact the Will County Assessor's office to confirm which exemptions are available and the application deadlines.
Data sources: US Census Bureau ACS 2023 5-Year Estimates, US Census Gazetteer (2024), County Adjacency File