| ZIP Codes: | 7 ZIP Codes (7 Standard, 0 PO Box, 0 Unique) [See All] |
| Area Codes: | 217 / 447 |
| Timezone: | Central (GMT -06:00) |
| Local Time: | 11:53:17 PM |
| Population: | 46,961 [See All] |
| FIPS: | 17029 |
| CBSA: | Charleston-Mattoon, IL |
| Land Area: | 495 sq mi |
| Water Area: | 2 sq mi |
| Coordinates: | 39.5005, -88.2279 |
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46,961 residents live across 7 ZIPs covering 495 sq mi, served by 7 distinct USPS-recognized cities.
Population moved from 53,644 to 46,961 from 2014 to 2024 — a -12.5% change. 2 ZIPs gained residents, 5 lost.
The county's wealthiest ZIP 62469 (Trilla, $116,440 median) and poorest ZIP 61920 (Charleston, $52,429) are 14.7 miles apart — a 2.2× income gap across local geography.
Median home values vary 1.4× across this county — from $109,000 in 61943 (Oakland) to $154,200 in 62469 (Trilla).
Density varies 8× across the county — from 20 people/sq mi in 61943 (Oakland) to 161 in 61938 (Mattoon).
Educational attainment ranges from 17.0% bachelor's+ in 61931 (Humboldt) to 34.9% in 61920 (Charleston) — the breadth of educational profiles across the area.
Within Illinois, this is the #32 most populous of 102 counties and ranks #50 for median household income .
Weighted by population, the typical household earns about $57,299 across the county — reflecting what a typical resident sees, not a simple ZIP average.
27.0% of adults age 25+ hold a bachelor's degree or higher (8,226 of 30,468 reporting).
7 Standard delivery, 0 PO Box only, 0 single-entity Unique ZIPs serve this county.
| ZIP | City | Type | Population | Median Income | Area (sq mi) | 10-yr Growth |
|---|---|---|---|---|---|---|
| 61920 | Charleston | Standard | 20,951 | $52,429 | 148.8 | -19.3% |
| 61938 | Mattoon | Standard | 20,350 | $57,503 | 126.6 | -7.1% |
| 61943 | Oakland | Standard | 1,396 | $54,196 | 68.2 | 1.1% |
| 61931 | Humboldt | Standard | 1,350 | $74,125 | 33.7 | -1.4% |
| 61912 | Ashmore | Standard | 1,255 | $74,954 | 51.3 | -0.4% |
| 62440 | Lerna | Standard | 1,107 | $79,605 | 42.6 | -17.7% |
| 62469 | Trilla | Standard | 552 | $116,440 | 23.7 | 27.8% |