Coles County, Illinois
County seat: Charleston · Population 46,607 (2025) · 508 sq mi
Coles County is the 31st most populous of Illinois's 102 counties, with 46,607 people (2025 estimate). Its county seat is Charleston. It is part of the Southeast region, one of the 10 Illinois economic development regions (DCEO). The map shows its 6 cities and towns and the 6 neighboring counties.
Coles County facts
- County seat
- Charleston
- Population (2025 estimate)
- 46,607 −1.2% since 2020
- Land area
- 508 sq mi 52nd largest of 102
- Water area
- 2 sq mi
- Population density
- 92 per sq mi
- Established
- 1830
- Named after
- Edward Coles 2nd governor of Illinois (1786-1868)
- Largest city
- Charleston 17,466
- Median household income
- $56,478
- Cities and towns
- 6 plus 2 CDPs
- ZIP codes
- 16
- Time zone
- Central
- FIPS code
- 17029
Cities and towns in Coles County
Coles County has 6 incorporated cities, towns and villages. Populations count the people living inside Coles County; cities that cross a county line also list the other counties.
| Name | Type | Population 2025 | Also in |
|---|---|---|---|
| Charleston (county seat) | City | 17,466 | |
| Mattoon | City | 16,667 | |
| Oakland | City | 721 | |
| Ashmore | Village | 627 | |
| Humboldt | Village | 354 | |
| Lerna | Village | 216 |
Unincorporated communities (CDPs)
Census-designated places are communities without their own city government; the county provides their services.
| Community | Population | Also in |
|---|---|---|
| Janesville | 39 | Cumberland County |
| Trilla | 27 | Cumberland County |
ZIP codes in Coles County
16 ZIP codes reach into Coles County. ZIP codes ignore county lines, so some also cover a neighboring county.
- 61910 also Douglas County
- 61911 also Moultrie and Douglas counties
- 61912
- 61920
- 61928 also Moultrie and Shelby counties
- 61930 also Douglas County
- 61931
- 61933 also Edgar and Clark counties
- 61938 also Cumberland and Moultrie counties
- 61943 also Douglas and Edgar counties
- 61951 also Moultrie County
- 62420 also Clark, Cumberland and Jasper counties
- 62440 also Cumberland County
- 62447 also Cumberland and Shelby counties
- 62469 also Cumberland County
- 62474 also Clark County
Population of Coles County, 2020–2025
Coles County shrank by 580 people (−1.2%) between April 2020 and July 2025: 469 more deaths than births and a net loss of 136 people from migration.
| Year (July 1) | Population |
|---|---|
| 2020 | 47,087 |
| 2021 | 47,657 |
| 2022 | 46,722 |
| 2023 | 46,690 |
| 2024 | 46,573 |
| 2025 | 46,607 |
Neighboring counties
- Douglas County north · 19,880 people
- Cumberland County south · 10,208 people
- Edgar County northeast · 16,323 people
- Moultrie County west · 14,371 people
- Clark County southeast · 15,114 people
- Shelby County west · 20,576 people
Printable Coles County map
The PDF is a vector file with real text: it prints sharp on Letter paper and you can search it for a town. The PNG is 2400 pixels wide for slides and documents. Both are free to use with a credit to WhichCounty.
- PDF (Letter) (83 KB)
- PNG (2400 px) (61 KB)
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Sources
- Boundaries: U.S. Census Bureau, 2025 Cartographic Boundary Files (1:500,000).
- Population: Census Bureau county and city estimates, Vintage 2025. CDP populations: American Community Survey 2020–2024.
- Places and ZIP codes: Census Bureau 2026 Gazetteer and 2020 ZIP Code Tabulation Area relationship files.
- County seat, founding year and name origin: Wikidata (CC0), checked against state sources.
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