Chatham, IL land: flood and parcels
5,580 parcels
On the county tax roll
- Acres on the roll4,290
- In a FEMA flood zone3.9%special flood hazard area
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
What land sells for in Chatham
Land here sold for $39.8k–$68.2k a lot (12 sales, Oct 2024–Sep 2026)
| Size | Middle half | Median | Sales | Months |
|---|---|---|---|---|
| Lots under 1 acre | $39.8k–$68.2k a lot | $58.4k | 12 | Oct 2024–Sep 2026 |
The middle half (25th to 75th percentile) and the median of arm's-length single-parcel land sales. 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 Chatham yet. Ask the village's or Sangamon County's planning office which zoning applies to a parcel.
Around Chatham
Parcels to start with
Flood zones and wetlands
Recorded flood claims in Chatham
21 insured flood claims were recorded in and around Chatham from 1978 to Sep 2026; fewer than 10 were on buildings rated outside the mapped flood zone (zone X, B or C). FEMA paid $354,000 on them in total.
| Years | Claims |
|---|---|
| 1978–79 | Fewer than 10 |
| 1980–89 | Fewer than 10 |
| 1990–99 | 12 |
| 2000–09 | Fewer than 10 |
| 2010–19 | Fewer than 10 |
| 2020–26 | Fewer than 10 |
Area statistics for buildings with NFIP flood insurance, not any one parcel: a lot that never had an insured building has no claims to count. OpenFEMA NFIP Redacted Claims v3, as of Sep 2026.
Counted in the 4 census block groups that lie mostly inside Chatham, 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 Chatham
- Population14,579July 2025 estimate, +1.1% since 2020
- Median household income$106,7732020–2024 average, ±$8,322
- New homes permitted252025, 25 single-family; 47 in 2021
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 Chatham by useLand use on the county roll
| Land class | Parcels | Share |
|---|---|---|
| Building on record | 4,895 | 88% |
| Other or not coded | 677 | 12% |
| Farm and timber | 7 | 0.1% |
| Residential lot | 1 | under 0.1% |
7 farm and timber parcels cover 95 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 Chatham is 0.28 acre (5,580 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 ChathamFarm and timber parcels to start with
Farm and timber parcels of an acre or more, each with its own page of public roll facts.
Nearby townsTowns around it
Questions about Chatham landAnswers from the public records
How many parcels are in Chatham, IL?
5,580 parcels on the Sangamon County parcel layer (pulled Oct 2026), covering 4,290 acres.
Is vacancy verified in Chatham, 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 Chatham?
The median parcel is 0.28 acre, from 5,580 parcels with a recorded size.
How much of Chatham 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 Chatham?
0.5% of parcels are a quarter or more wetland on the USFWS National Wetlands Inventory, a mapping guide, not a legal delineation.
What is Chatham zoned?
Our map has no zoning layer for Chatham yet. Ask the village's or Sangamon County's planning office which zoning applies to a parcel.
How many people live in Chatham?
About 14,579 (Census estimate for July 1, 2025), +1.1% since 2020.
How many new homes are being built in Chatham?
Building permits authorized 25 new housing units in 2025 (Census Building Permits Survey).
Where does this data come from?
Parcels: Sangamon County parcels: Sangamon County GIS (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 Sangamon CountyIts other towns
About these numbersSources, dates and how these figures are built
Sources
Parcels: Sangamon County parcels: Sangamon County GIS (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 county's own file, through Sep 2026; counted on our map built Oct 2026.