Median estimated market value for properties in this county.
AssessorSearch county dataMercer County, IL
Mercer 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 Mercer County, Illinois. Search an address or APN, then jump to official county sources or property tax and value data.
Search a Mercer County address or APN
Official sources
Mercer 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 | Mercer County Supervisor of Assessmentswww.mercercountyil.org/deparments/assessments.php |
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| Property search | Mercer County Property Tax Inquirymerceril.devnetwedge.com |
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| Deeds and recorded documents | Mercer County Clerk/Recorderwww.mercercountyil.org/deparments/county_clerk_recorder.php |
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| Property taxes | Mercer County Treasurer Property Taxwww.mercercountyil.org/deparments/treasurer.php |
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| GIS and parcel maps | Mercer County Assessment Officewww.mercercountyil.org/deparments/assessments.php |
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| Permits and building records | Mercer County Zoning and Building Permitswww.mercercountyil.org/deparments/zoning.php |
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| Clerk records | Mercer County Clerk/Recorderwww.mercercountyil.org/deparments/county_clerk_recorder.php |
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| Zoning and land use | Mercer County Zoningwww.mercercountyil.org/deparments/zoning.php |
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County data
Mercer 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 |
|---|---|---|---|---|
| Aledo | $153,259 | $40,040 | 2.05% | $2,749 |
| Sherrard | $212,985 | $63,150 | 2.06% | $4,226 |
| New Boston | $104,939 | $24,705 | 1.80% | $1,527 |
| Viola | $155,345 | $40,800 | 1.96% | $2,719 |
| New Windsor | $130,000 | $34,868 | 2.00% | $2,169 |
| Joy | $113,091 | $28,663 | 1.97% | $2,093 |
| Keithsburg | $73,744 | $16,828 | 1.72% | $905 |
| Alexis | $146,333 | $33,030 | 1.77% | $2,159 |
| Matherville | $134,644 | $35,950 | 2.09% | $2,464 |
| Seaton | $96,696 | $30,825 | 1.99% | $1,860 |
FAQ
Mercer County property records FAQ
Common questions about assessor, deed, tax, GIS, and permit records.
Where can I search Mercer County property records by address?
Use the official Mercer County Property Tax Inquiry to search Mercer County property records by address or parcel number. Use AssessorSearch property search as a free, easy-to-use option to search Mercer County by address or APN.
How do I find the owners of Mercer County properties?
Use the official Mercer County Property Tax 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 Mercer County properties by address or APN.
Where can I verify assessed value in Mercer County?
Use the official Mercer County Supervisor of Assessments for assessed values, parcel details, exemptions, and property characteristics when those records are available online.
Where can I look up Mercer County property tax bills or payments?
Use the official Mercer County Treasurer Property Tax for property tax bills, payment history, due dates, or tax collector records.
Where can I find deeds or recorded documents in Mercer County?
Use the official Mercer County Clerk/Recorder 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 Mercer County?
Use the official Mercer County Assessment Office 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 Mercer County?
Use Mercer County Zoning and Building Permits for permits and Mercer County Zoning for zoning or land-use records. City properties may require city-specific permit or planning portals.
Can I build a list of Mercer County property owners?
Use Affix by AssessorSearch for county property owner lists, filters, exports, skip tracing, and outreach workflows.
Related counties
More Illinois property records
Use related county pages when researching nearby property records or comparing official source patterns.