Median estimated market value for properties in this county.
AssessorSearch county dataWinnebago County, IL
Winnebago County, IL assessor property search and records
Use this county guide to find official assessor property search resources, recorder and deed links, tax records, GIS parcel maps, permits, and property data insights for Winnebago County, Illinois. Search an address or APN, then jump to official county sources or property tax and value data.
Search a Winnebago County address or APN
Official sources
Winnebago County assessor, recorder, tax, and parcel map sources
Use this table to find the official county source for assessor property search, recorded documents, property tax, GIS parcel maps, permits, and zoning records.
| Record type | Official source | Notes |
|---|---|---|
| Assessed values | Winnebago County Supervisor of Assessments Parcel Inquiryassessor.wincoil.gov/search/ |
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| Deeds and recorded documents | Winnebago County Recorder Records Searchwincoil.gov/departments/recorders-office/records-search |
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| Property taxes | Winnebago County Treasurer Parcel Tax Details Inquirytaxes.wincoil.gov |
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| GIS and parcel maps | WinGIS Property Searchwingis.org/maps/propertysearch |
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| Permits and building records | Winnebago County Building Divisionwincoil.gov/departments/community-development/building-division |
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| Zoning and land use | Winnebago County Planning & Zoning Divisionwincoil.gov/departments/community-development/planning-and-zoning-division |
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County data
Winnebago County tax rates and property values
County and city-level rollups from AssessorSearch indexed property data. Use these values as directional context, then verify parcel-specific details with the official county sources above.
Median assessed value from county assessment records when available.
AssessorSearch county dataMedian annual property tax amount from indexed tax records when available.
AssessorSearch county dataMedian effective property tax rate calculated from annual tax and value fields.
AssessorSearch county dataCity property data
Top city rollups for estimated value, assessed value, property tax rate, and tax amount.
| City | Median estimated value | Median assessed value | Median effective property tax rate | Median tax amount |
|---|---|---|---|---|
| Rockford | $181,287 | $42,003 | 1.80% | $3,108 |
| Machesney Park | $211,649 | $52,899 | 1.74% | $3,465 |
| Loves Park | $191,972 | $49,053 | 1.79% | $3,374 |
| Roscoe | $319,542 | $78,443 | 1.94% | $6,036 |
| Rockton | $288,979 | $74,977 | 1.95% | $5,493 |
| South Beloit | $234,312 | $59,768 | 1.73% | $4,035 |
| Winnebago | $257,731 | $67,464 | 1.93% | $5,026 |
| Cherry Valley | $273,436 | $73,068 | 1.80% | $4,919 |
| Pecatonica | $185,985 | $48,241 | 1.72% | $3,108 |
| Davis | $276,589 | $73,978 | 1.81% | $5,011 |
FAQ
Winnebago County property records FAQ
Common questions about assessor, deed, tax, GIS, and permit records.
Where can I search Winnebago County property records by address?
Use the official Winnebago County Supervisor of Assessments Parcel Inquiry to search Winnebago County property records by address or parcel number. Use AssessorSearch property search as a free, easy-to-use option to search Winnebago County by address or APN.
How do I find the owners of Winnebago County properties?
Use the official Winnebago County Supervisor of Assessments Parcel Inquiry for county ownership and parcel records when owner names are available online. Use AssessorSearch property search as a free, easy-to-use option to look up Winnebago County properties by address or APN.
Where can I verify assessed value in Winnebago County?
Use the official Winnebago County Supervisor of Assessments Parcel Inquiry for assessed values, parcel details, exemptions, and property characteristics when those records are available online.
Where can I look up Winnebago County property tax bills or payments?
Use the official Winnebago County Treasurer Parcel Tax Details Inquiry for property tax bills, payment history, due dates, or tax collector records.
Where can I find deeds or recorded documents in Winnebago County?
Use the official Winnebago County Recorder Records Search for deeds, mortgages, liens, plats, and other recorded documents. These records are usually separate from assessor property-value records.
Where can I view parcel maps or GIS data in Winnebago County?
Use the official WinGIS Property Search for parcel maps, map layers, boundaries, and GIS context. GIS maps should be treated as reference tools, not legal surveys.
Where can I search permits or zoning in Winnebago County?
Use Winnebago County Building Division for permits and Winnebago County Planning & Zoning Division for zoning or land-use records. City properties may require city-specific permit or planning portals.
Can I build a list of Winnebago County property owners?
Use Affix by AssessorSearch for county property owner lists, filters, exports, skip tracing, and outreach workflows.
Related counties
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Use related county pages when researching nearby property records or comparing official source patterns.