Mount Vernon, IL land: prices, flood and parcels
8,840 parcels
On the county tax roll
- Acres on the roll8,339
- In a FEMA flood zone3.9%special flood hazard area
- Land / lot sales7recorded 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.
Free account: 25 parcel cards a day on the map, with sale history, road access and elevation. Get started free
Our map has no zoning layer for Mount Vernon yet. Ask the city's or Jefferson County's planning office which zoning applies to a parcel.
Around Mount Vernon
Parcels to start with
Flood zones and wetlands
Recorded flood claims in Mount Vernon
Fewer than 10 insured flood claims were recorded in and around Mount Vernon from 1978 to Sep 2026. FEMA counts claims on buildings with NFIP flood insurance, so land without an insured building never shows here.
Counted in the 12 census block groups that lie mostly inside Mount Vernon, so the edges may reach past the town line. This product uses the Federal Emergency Management Agency's OpenFEMA API, but is not endorsed by FEMA. The Federal Government or FEMA cannot vouch for the data or analyses derived from these data.
People and new homes in Mount Vernon
- Population14,187July 2025 estimate, −2.6% since 2020
- Median household income$55,3572020–2024 average, ±$4,203
- New homes permitted122025, 12 single-family; 8 in 2021
- Permitted so far in 20262Jan–Aug, against 10 a year earlier
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 Mount Vernon by useLand use on the county roll
| Land class | Parcels | Share |
|---|---|---|
| Building on record | 6,458 | 73% |
| Other or not coded | 1,361 | 15% |
| Institutional | 906 | 10% |
| Farm and timber | 112 | 1.3% |
| Residential lot | 3 | under 0.1% |
112 farm and timber parcels cover 1,725 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 Mount Vernon is 0.23 acre (8,840 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 Mount VernonFarm and timber parcels to start with
- 62.1 acres of farm and timber land
- 12165 N Wells Bypass 60.2 acres
- 59.0 acres of farm and timber land
- 53.3 acres of farm and timber land
- 11649 N Wells Bypass 53.0 acres
- 44.8 acres of farm and timber land
- 40.4 acres of farm and timber land
- 40.0 acres of farm and timber land
- 40.0 acres of farm and timber land
Farm and timber parcels of an acre or more, each with its own page of public roll facts.
Nearby townsTowns around it
Questions about Mount Vernon landAnswers from the public records
How many parcels are in Mount Vernon, IL?
8,840 parcels on the Jefferson County parcel layer (pulled Oct 2026), covering 8,339 acres.
Is vacancy verified in Mount Vernon, 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 Mount Vernon?
The median parcel is 0.23 acre, from 8,840 parcels with a recorded size.
How much of Mount Vernon is in a flood zone?
3.9% 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 Mount Vernon?
0.7% of parcels are a quarter or more wetland on the USFWS National Wetlands Inventory, a mapping guide, not a legal delineation.
What is Mount Vernon zoned?
Our map has no zoning layer for Mount Vernon yet. Ask the city's or Jefferson County's planning office which zoning applies to a parcel.
Has land sold recently in Mount Vernon?
7 recorded arm's-length sales declared land / lot only on the transfer form, from Oct 2025 to Sep 2026, from the Illinois PTAX-203 transfer declarations.
How many people live in Mount Vernon?
About 14,187 (Census estimate for July 1, 2025), −2.6% since 2020.
How many new homes are being built in Mount Vernon?
Building permits authorized 12 new housing units in 2025 and 2 from January to Aug 2026 (against 10 a year earlier) (Census Building Permits Survey).
Where does this data come from?
Parcels: Jefferson County parcels: a copy published by The Sidwell Company, the county's mapping vendor (layer as of Oct 2026). 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 Jefferson CountyIts other towns
About these numbersSources, dates and how these figures are built
Sources
Parcels: Jefferson County parcels: a copy published by The Sidwell Company, the county's mapping vendor (layer as of Oct 2026) (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: the Illinois PTAX-203 transfer declarations, through Sep 2026; counted on our map built Oct 2026.