McDonough County, Illinois
County seat: Macomb · Population 25,916 (2025) · 589 sq mi
McDonough County is the 51st most populous of Illinois's 102 counties, with 25,916 people (2025 estimate). Its county seat is Macomb. It is part of the West Central region, one of the 10 Illinois economic development regions (DCEO). The map shows its 11 cities and towns and the 5 neighboring counties.
McDonough County facts
- County seat
- Macomb
- Population (2025 estimate)
- 25,916 −4.9% since 2020
- Land area
- 589 sq mi 36th largest of 102
- Water area
- 1 sq mi
- Population density
- 44 per sq mi
- Established
- 1826
- Named after
- Thomas Macdonough American naval officer (1783-1825)
- Largest city
- Macomb 14,530
- Median household income
- $52,795
- Cities and towns
- 11 plus 1 CDPs
- ZIP codes
- 17
- Time zone
- Central
- FIPS code
- 17109
Cities and towns in McDonough County
McDonough County has 11 incorporated cities, towns and villages. Populations count the people living inside McDonough County; cities that cross a county line also list the other counties.
| Name | Type | Population 2025 | Also in |
|---|---|---|---|
| Macomb (county seat) | City | 14,530 | |
| Bushnell | City | 2,600 | |
| Colchester | City | 1,070 | |
| Blandinsville | Village | 544 | |
| Prairie City | Village | 392 | |
| Industry | Village | 383 | |
| Good Hope | Village | 349 | |
| Bardolph | Village | 203 | |
| Tennessee | Village | 98 | |
| Sciota | Village | 32 | |
| Plymouth | Village | 3 | Hancock County |
Unincorporated communities (CDPs)
Census-designated places are communities without their own city government; the county provides their services.
| Community | Population | Also in |
|---|---|---|
| Adair | 215 |
ZIP codes in McDonough County
17 ZIP codes reach into McDonough County. ZIP codes ignore county lines, so some also cover a neighboring county.
- 61411
- 61416
- 61420 also Hancock County
- 61422
- 61438
- 61440 also Schuyler County
- 61450 also Hancock and Henderson counties
- 61452 also Schuyler County
- 61455
- 61459 also Fulton County
- 61470
- 61475 also Warren and Henderson counties
- 61482 also Fulton County
- 61484 also Fulton and Schuyler counties
- 62326 also Hancock County
- 62367 also Hancock and Schuyler counties
- 62374 also Hancock County
Population of McDonough County, 2020–2025
McDonough County shrank by 1,338 people (−4.9%) between April 2020 and July 2025: 474 more deaths than births and a net loss of 903 people from migration.
| Year (July 1) | Population |
|---|---|
| 2020 | 27,128 |
| 2021 | 27,122 |
| 2022 | 26,777 |
| 2023 | 26,804 |
| 2024 | 26,115 |
| 2025 | 25,916 |
Neighboring counties
- Hancock County west · 16,803 people
- Schuyler County south · 6,657 people
- Fulton County east · 32,901 people
- Warren County north · 16,222 people
- Henderson County northwest · 5,984 people
Printable McDonough 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) (90 KB)
- PNG (2400 px) (70 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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