Peoria County, IL
What LandBenchmark can tell you about a parcel in Peoria County — and, just as importantly, what it can't.
- Land area
- 618.7
- sq mi
- Water area
- 11.6
- sq mi
- County FIPS
- 17143
- Center
- 40.786, -89.767
Area and center from the US Census Bureau 2023 Gazetteer.
Measured terrain around the Peoria County centroid
- Centroid elevation
- 201
- m (659 ft)
- Terrain relief
- 56
- m spread (p95−p5, ~20–40 km window)
The county center sits at about 201 m above sea level. Elevation across the sampled window spreads 56 m — gently rolling terrain by our banding (flat <30 m · gently rolling 30–100 m · hilly 100–300 m · mountainous >300 m). These are county-scale context, not parcel measurements — a specific parcel gets its own slope, flood and usable-acreage readings when analyzed.
Elevation measured 2026-07-21 from the AWS Terrain Tiles (terrarium encoding, z10).
Data available for Peoria County
- No free owner records. Illinois does not publish a free statewide parcel-and-owner dataset, so LandBenchmark cannot show who owns a parcel in Peoria County. The county assessor's office is the authoritative source. Every measured signal below is unaffected.
- Legal description — township, range and section from the BLM Public Land Survey System.
- FEMA flood zones, wetlands, soil survey and NCCPI soil productivity — the federal layers, all free and all available here.
- 56 measured signals from satellite imagery and public records — slope and usable acreage, observed surface water, vegetation trend, wildfire and seismic hazard, access and neighboring land use. Each one cites its method, its source, and the date it was observed.
LandBenchmark has no listings and does not know what is for sale in Peoria County. It analyses a parcel you point it at. It is an automated Phase-1 desk screen, not a survey, a flood determination, or a substitute for on-site inspection.
Common questions about land in Peoria County
Can I see who owns a parcel in Peoria County?
Not from free data — Illinois does not publish a free statewide parcel-ownership dataset, and LandBenchmark does not buy broker data. The Peoria County assessor's office is the authoritative source; every measured signal is unaffected.
How hilly is Peoria County?
Around the county center, measured elevation spreads 56 m across a ~20–40 km window — gently rolling terrain by our banding. Individual parcels vary: a report measures the actual slope and usable acreage of the parcel you point it at.
What can LandBenchmark measure for a parcel in Peoria County?
56 measured signals, each cited with source and observation date: FEMA flood zone plus surface water observed in multi-year imagery, USFWS wetlands, USDA soil survey and productivity, slope and usable acreage, wildfire and seismic hazard, access and surroundings. What a satellite cannot verify — title, zoning, perc results, water rights — goes on a human-verify checklist naming the Peoria County offices that can.