Property Taxes in Naperville
Naperville property taxes are governed by a real, structurally important fact: the city spans DuPage and Will counties with genuinely different effective rates -- approximately 2.05% median on the DuPage side (2.03%-2.23% by ZIP) versus approximately 2.35% median on the Will side (annual bills from $7,766 to $13,211 by ZIP) -- both well above the roughly 0.9% national average.
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Learn moreThe County Line Is the Single Most Important Property-Tax Fact About Naperville
Naperville is not one property-tax jurisdiction -- it spans DuPage County (the larger population share, roughly 95,000 residents on an older count) and Will County (roughly 45,000). Buyers should confirm which county a target address falls in as one of the very first steps in evaluating a property's real ongoing cost, not an afterthought.
DuPage-Side Naperville Runs a Median Effective Rate of Approximately 2.05%
Per Ownwell's analysis of actual DuPage County property records, Naperville's DuPage-side median effective property tax rate ran 2.05%, with real, disclosed variation by specific ZIP -- 2.03% in ZIP 60563 versus 2.23% in ZIP 60564 -- reflecting how school district boundaries are drawn across the county.
Will-Side Naperville Runs a Meaningfully Higher Median Rate of Approximately 2.35%
Per a separate Ownwell analysis of Will County property records, Naperville's Will-side median effective rate ran 2.35% -- meaningfully higher than the DuPage-side figure -- with actual annual bills ranging from $7,766 (ZIP 60540) to $13,211 (ZIP 60565), primarily reflecting differing school district levies and local assessment districts.
Both Figures Run Well Above the National Average
Both the DuPage-side (~2.05%) and Will-side (~2.35%) effective rates run well above the roughly 0.9% national average, consistent with Illinois's broader, statewide real property tax burden documented in illinoisMarketManifest.js (a statewide average effective rate around 2.08%, among the highest in the country) -- Naperville is not an exception to that statewide pattern.
Confirm the Actual Bill for a Specific Property
Given the real, disclosed spread by both county and specific ZIP code, confirm the actual current property tax bill for a specific Naperville-area property directly with the DuPage County or Will County Assessor's office rather than relying on any single citywide percentage figure.
Key takeaways
- Naperville spans two counties with genuinely different property tax rates -- confirm which one applies to a target address before evaluating a property's real cost.
- DuPage-side Naperville's median effective rate runs approximately 2.05% (2.03%-2.23% by ZIP).
- Will-side Naperville's median effective rate runs meaningfully higher, approximately 2.35% (annual bills $7,766-$13,211 by ZIP).
- Both rates run well above the ~0.9% national average, consistent with Illinois's broader statewide ~2.08% average effective rate -- among the highest in the country.
- Confirm the actual current property tax bill for a specific property directly with the relevant County Assessor's office.
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