Mercer County
Mercer County covers 561 square miles of northwestern Illinois, with the county seat at Aledo.
Open PublicGIS map Mercer County parcel map and property search
Mercer County official website
Taxes, deeds, permits and other Mercer County services on GovDir
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PublicGIS maps 13,039 parcels for Mercer County. PublicGIS does not show owner names for this county.
Where to find things
- Mercer County parcel map and property searchCounty GIS map · Property lines · Property owner · Property records · Parcel number · Aerial imagery
Mercer County's public map viewer for parcel boundaries and local map layers.
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- Sanborn Fire Insurance MapsDigitized Sanborn fire insurance maps showing building footprints, materials and uses for American towns and cities, widely used in property history and environmental research.
- USDA NAIP Imagery HubFind and download USDA's leaf-on aerial photography for the contiguous United States. Check coverage and acquisition dates for the area you need.
- Illinois GIS data downloadsGIS data downloads · Elevation · Addresses and 911 numbers
Download Illinois's statewide GIS data, such as roads, boundaries, imagery and elevation. It has no statewide property lines.
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- State Plane Coordinate System zonesThe official State Plane Coordinate System from the National Geodetic Survey: which zone covers each state and county, zone definitions and conversion tools.
- FEMA National Flood Hazard Layer ViewerInteractive nationwide map of current flood zones, base flood elevations and map panels.
- NCES School District BoundariesNational school district boundary maps and downloadable GIS files, with an address lookup for the district serving a location.
- Illinois State Geological SurveyIllinois geology: landslide, earthquake and ground hazards, groundwater, minerals and geologic maps.
- USGS National Map ViewerNational base map with elevation, hydrography, imagery, boundaries and PLSS layers.
- USGS topoViewBrowse and download every historical USGS topographic map for a location, useful for seeing old roads, buildings and shorelines.
- US Census GeocoderFree service that converts a street address into map coordinates and census geography. No account needed.
- Mercer County zoning and land useZoning
Zoning districts and land use rules, and which uses and buildings the rules permit on a given piece of land.
- Office
- Mercer County Planning and Zoning
- Phone
- 309-525-3799
- FEMA Flood Map Service CenterFlood zones
Official source for flood insurance rate maps. Enter an address to see the current flood zone and download the FIRM panel and letters of map change.
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- Illinois floodplain and flood mapsIllinois's floodplain program: the flood maps, the extra rules that apply to building or rebuilding near water, and who runs the program locally.
- FEMA Disaster DeclarationsSearch federal disaster and emergency declarations by state, county and incident to see whether an area was declared and what assistance was authorized.
- FEMA Increased Cost of ComplianceFlood insurance coverage that helps pay to elevate, relocate, demolish or floodproof a substantially damaged building.
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Explains that Illinois drainage districts are local bodies that build and maintain drains and levees, are headed by drainage commissioners, and tax the land inside the district. Commissioners file annual financial reports with the county or circuit court, and the State Archives describes the district records that survive.
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- NRCS wetland determinations and conservation complianceFarm wetland rules for USDA program participants. Before you drain, fill or clear a wet area in a farm field, ask NRCS at your local USDA Service Center for a wetland determination.
- Illinois Drainage CodeThe Illinois law that governs drainage districts, drainage commissioners and the ditches, tile and levees they maintain, with its articles listed for browsing.
- USDA Web Soil SurveySoils
Draw an area on the map to get soil types, drainage, septic suitability, building limitations and farmland ratings.
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- Conservation Reserve Program (CRP) sign-up, USDA Farm Service AgencyHow the Conservation Reserve Program works, which sign-ups are open and what it pays. You enroll land in CRP at your county Farm Service Agency office at the local USDA Service Center.
- Illinois Environmental Protection AgencyLakes and water
Illinois's environmental agency: water quality, wetlands, waste and the permits that go with them.
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- Illinois water wells and water rightsPrivate wells in Illinois: the construction permit, setbacks, water testing and the local health department that inspects the work.
- U.S. Drought MonitorWeekly national drought map by county, with historical conditions and state summaries.
- MRLC NLCD Land Cover ViewerLand cover
National land cover map for every year since 1985: forest, cropland, developed, wetland, water and change over time.
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- National Land Cover Database (NLCD) DownloadsFilter and download National Land Cover Database products including Annual NLCD land cover for the contiguous United States. Provides downloadable raster products and links to the viewer for spatial selection.
- Illinois state landsPublic land
State-owned land in Illinois: who manages it, what you may do on it, and how leases and easements work.
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- USGS map of public and protected landNational map of federal, state, local and other public and protected land from the U.S. Geological Survey Protected Areas Database (PAD-US).
- Mercer County RecorderPlats · Surveys and section corners
Where deeds, mortgages, easements and other land documents are recorded. Start here to search recorded documents or order a copy.
- Phone
- (309) 582-7021
- Address
- 100 SE 3rd Street Aledo, IL 61231
More options
- NGS survey mark and benchmark mapMap of National Geodetic Survey benchmarks and survey control marks. Zoom to a place, click a mark and open its datasheet with the mark's position, elevation and how to find it on the ground.
- Illinois licensed land surveyor lookupSearch the Illinois Land Surveyors Licensing Board for a licensed land surveyor by name or license number. Only a licensed surveyor can mark a legal property line on the ground, so check a surveyor's license before you hire one. Board phone 800-560-6420.
- BLM General Land Office RecordsSearch original federal land patents and survey plats by name or legal description to find the first private owner of a parcel.
- NGS Survey Mark DatasheetsFederal survey mark datasheets and control monument records, searchable by county or coordinates.
- Mercer County Highway DepartmentRoads
Maintains 150 miles of county highway and 31 bridges in Mercer County; the 15 townships handle the township roads.
- Phone
- (309) 582-2715
- Address
- 1630 Hwy 17, Aledo, IL 61231
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- Illinois Department of TransportationState highways in Illinois: road maps, projects, and the approach or access permit you need before you build a driveway onto a state road.
- 811 Before You DigCall 811 or use your state 811 center's website a few business days before any digging, including fence posts, decks, trees and mailboxes. The service is free, and the utilities mark their buried lines with paint or flags. This page lists every state's 811 center.
- National Pipeline Mapping SystemPublic map viewer of transmission pipelines and operator contacts by county, for excavation planning and emergency response.
- U.S. wildfire risk mapHazards and emergency information
Type a community, county or state to see its wildfire likelihood, risk to homes and exposure, with maps and charts. It shows long-term risk, not current fires, and is a screening tool, not an official hazard designation for a property.
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- U.S. hurricane storm surge risk mapsInteractive map of how deep storm surge flooding could get near the coast in a worst-case hurricane of each category. It does not replace your local hurricane evacuation zone; check the state or county zone lookup for that.
- U.S. landslide mapInteractive national map of known landslides and how susceptible the ground is to landslides. It is a broad screening map, not a site-specific assessment.
Mercer County offices
- Mercer County Supervisor of Assessments and GIS DepartmentProperty valuation and classification.Runs the GIS and maps for Mercer County.Symone M. Morford, Supervisor of AssessmentsTerra K. Finley, GIS Director/Deputy Clerk
- Phone
- 309-582-7814
- smorford@mercercountyil.org
- tfinley@mercercountyil.org
- Address
- 100 SE 3rd Street, Aledo, IL 61231
- Website
- Visit website
- Mercer County property tax search and paymentSearch parcels by number, house range, sale price or date and view tax bills for any year.
- Mercer County Health DepartmentCounty environmental health services. Call to confirm who issues septic permits here.
- Phone
- (309) 582-3759
- Address
- 305 NW 7th Street, Aledo, IL 61231
- Website
- Visit website
- Mercer County USDA FSA and NRCS officeThe Farm Service Agency office for Mercer County is at the Aledo Service Center, 308 SE 8TH Ave, Aledo, IL 61231. Call it to sign up for the Conservation Reserve Program (CRP) and other farm programs, and for farm and tract records. The Natural Resources Conservation Service (NRCS) works from the same office: ask it for wetland determinations, highly erodible land questions and conservation plans.
- Phone
- (309) 582-5153
- Address
- 308 SE 8TH Ave, Aledo, IL 61231
- Website
- Visit website
Guides
Other Illinois counties
Neighboring counties
About Mercer County
Mercer County covers 561 square miles of northwestern Illinois, with the county seat at Aledo. The county assessment office values your house and land, the County Treasurer bills and collects the tax, and the County Recorder keeps recorded land documents. In most counties an elected township assessor does the first valuation.
Cities and townships in Mercer County
- Aledo
- Alexis
- Joy
- Keithsburg
- Matherville
- New Boston
- North Henderson
- Reynolds
- Seaton
- Sherrard
- Viola
- Windsor VillageWindsor Village Clerk · 309-667-2377
- Abington Township
- Duncan Township
- Eliza Township
- Greene Township
- Keithsburg Township
- Mercer Township
- Millersburg Township
- New Boston Township
- North Henderson Township
- Ohio Grove Township
- Perryton Township
- Preemption Township
- Richland Grove Township
- Rivoli Township
- Suez Township