Knoxville, IL land: prices, flood and parcels
1,405 parcels
On the county tax roll
Map data Oct 14, 2026
- Acres on the roll1,279
- In a FEMA flood zone1.2%special flood hazard area
- Land / lot sales1recorded arm's-length, Oct 2025–Sep 2026, declared land / lot only
Illinois 2026 taxes are billed in 2027: the first installment is due no earlier than June 1, 2027.
Sources: Illinois Property Tax Code 35 ILCS 200/21-15, 35 ILCS 200/21-25, 35 ILCS 200/21-30 and 35 ILCS 200/16-55. Checked Oct 13, 2026.
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What land sells for in Knox County
Knoxville has fewer than 10 clean land sales of its own of any one size in 36 months, so these are Knox County's: lots under 1 acre in Knox County sold for $3,200–$4,500 a lot (41 sales, Oct 2025–Sep 2026)
| Size | Middle half | Median | Sales | Months |
|---|---|---|---|---|
| Lots under 1 acre | $3,200–$4,500 a lot | $3,800 | 41 | Oct 2025–Sep 2026 |
| 1 to 10 acres | $3.5k–$11.0k an acre | $6,200 | 12 | Oct 2024–Sep 2026 |
| 10 acres or more | $7.8k–$14.4k an acre | $9,700 | 30 | Oct 2025–Sep 2026 |
The middle half (25th to 75th percentile) and the median of arm's-length single-parcel land sales. Each size uses its own months (the shortest of 12, 24 or 36 that holds enough sales), so the sizes' counts need not add up to another figure on this page. Source: Illinois Department of Revenue PTAX-203 declarations, land or farm at the sale, screen S1. Recorded sales, not an estimate of any parcel.
Our map has no zoning layer for Knoxville yet. Ask the city's or Knox County's planning office which zoning applies to a parcel.
Around Knoxville
Parcels to start with
Flood zones and wetlands
People and new homes in Knoxville
- Population2,810July 2025 estimate, −3.0% since 2020
- Median household income$82,8632020–2024 average, ±$21,555
- New homes permitted02025, 0 single-family
U.S. Census Bureau, Population Estimates Program, Vintage 2025 (May 2026); U.S. Census Bureau, American Community Survey 2020-2024 5-year (B19013) (Jan 2026); U.S. Census Bureau, Building Permits Survey (Sep 2026).
Illinois land market report · Illinois land prices by quarter
Land in Knoxville by useLand use on the county roll
| Land class | Parcels | Share |
|---|---|---|
| Building on record | 1,245 | 89% |
| Other or not coded | 84 | 6% |
| Institutional | 42 | 3% |
| Farm and timber | 34 | 2.4% |
34 farm and timber parcels cover 417 acres. County tax roll, as of Oct 2026; land class read from the roll's land-use and building fields.
Typical lot sizeThe typical lot, from the roll
The median parcel in Knoxville is 0.29 acre (1,404 parcels with a size).
Acres from the county roll, or from the parcel's own outline where the roll's figure is off by more than three times. Condominium units that share one point (each carrying the whole complex's acres) are left out of the lot sizes.
Land parcels in KnoxvilleLand and farm parcels to start with
- 5.9 acres of farm and timber land
- 781 US Highway 150 E 5.40 acres
- 5.2 acres of farm and timber land
- 515 Henderson Rd 5.14 acres
- 800 N Market St 59.0 acres
- 996 W Main St 40.0 acres
- 21.8 acres of farm and timber land
- 21.7 acres of farm and timber land
Land and farm parcels of an acre or more, each with its own page of public roll facts.
Nearby townsTowns around it
Questions about Knoxville landAnswers from the public records
How many parcels are in Knoxville, IL?
1,405 parcels on the Knox County parcel layer (pulled Oct 2026) inside the Census Bureau's boundary for Knoxville, which can differ from its own limits at the edges, covering 1,279 acres.
Is vacancy verified in Knoxville, IL?
Vacancy not verified: each parcel page says whether the county roll or building footprints show a building.
What is the typical lot size in Knoxville?
The median parcel is 0.29 acre, from 1,404 parcels with a recorded size.
How much of Knoxville is in a flood zone?
1.2% of parcels are in a FEMA special flood hazard area (National Flood Hazard Layer, as of Oct 2026). Check each parcel's own flood line before you buy.
Are there wetlands in Knoxville?
0.1% of parcels are a quarter or more wetland on the USFWS National Wetlands Inventory, a mapping guide, not a legal delineation.
What is Knoxville zoned?
Our map has no zoning layer for Knoxville yet. Ask the city's or Knox County's planning office which zoning applies to a parcel.
Has land sold recently in Knoxville?
Knoxville has fewer than 10 clean land sales of its own of any one size in 36 months. The land-price bands on this page are its county's: 83 arm's-length single-parcel land sales from Oct 2024 to Sep 2026, from Illinois Department of Revenue PTAX-203 declarations.
How many people live in Knoxville?
About 2,810 (Census estimate for July 1, 2025), −3.0% since 2020.
How many new homes are being built in Knoxville?
Building permits authorized 0 new housing units in 2025 (Census Building Permits Survey).
Where does this data come from?
Parcels: Knox County parcels: Knox County, Illinois GIS (county ArcGIS Server) (layer as of Apr 2025). Flood: FEMA National Flood Hazard Layer. Wetlands: USFWS National Wetlands Inventory. Towns: U.S. Census places. Every figure is counted from those files on our map.
More in Knox CountyIts other towns
About these numbersSources, dates and how these figures are built
Sources
Parcels: Knox County parcels: Knox County, Illinois GIS (county ArcGIS Server) (layer as of Apr 2025) (pulled Oct 2026); flood: FEMA National Flood Hazard Layer (as of Oct 2026); wetlands: USFWS National Wetlands Inventory (as of Oct 2026); town limits: U.S. Census Bureau TIGER/Line places; sales: Illinois Department of Revenue PTAX-203 declarations, through Sep 2026; counted on our map built Oct 2026.