Macon County, Illinois
County seat: Decatur · Population 99,300 (2025) · 581 sq mi
Macon County is the 20th most populous of Illinois's 102 counties, with 99,300 people (2025 estimate). Its county seat is Decatur. It is part of the Central region, one of the 10 Illinois economic development regions (DCEO). The map shows its 12 cities and towns and the 7 neighboring counties.
Macon County facts
- County seat
- Decatur
- Population (2025 estimate)
- 99,300 −4.5% since 2020
- Land area
- 581 sq mi 38th largest of 102
- Water area
- 5 sq mi
- Population density
- 171 per sq mi
- Established
- 1829
- Same name
- One of 6 Macon Counties in the US
- Named after
- Nathaniel Macon Speaker of the House (1757-1837)
- Largest city
- Decatur 67,884
- Median household income
- $62,666
- Cities and towns
- 12 plus 2 CDPs
- ZIP codes
- 27
- Time zone
- Central
- FIPS code
- 17115
Cities and towns in Macon County
Macon County has 12 incorporated cities, towns and villages. Populations count the people living inside Macon County; cities that cross a county line also list the other counties.
| Name | Type | Population 2025 | Also in |
|---|---|---|---|
| Decatur (county seat) | City | 67,884 | |
| Mount Zion | Village | 5,880 | |
| Forsyth | Village | 3,613 | |
| Maroa | City | 1,517 | |
| Harristown | Village | 1,247 | |
| Long Creek | Village | 1,212 | |
| Macon | City | 1,120 | |
| Blue Mound | Village | 1,078 | |
| Warrensburg | Village | 1,068 | |
| Argenta | Village | 872 | |
| Oreana | Village | 845 | |
| Niantic | Village | 578 |
Unincorporated communities (CDPs)
Census-designated places are communities without their own city government; the county provides their services.
| Community | Population | Also in |
|---|---|---|
| Boody | 301 | |
| Elwin | 40 |
ZIP codes in Macon County
27 ZIP codes reach into Macon County. ZIP codes ignore county lines, so some also cover a neighboring county.
- 61749 also De Witt and Logan counties
- 61756 also De Witt County
- 61818 also Piatt County
- 61830 also Piatt County
- 61882 also De Witt and Piatt counties
- 61914 also Moultrie and Shelby counties
- 61925 also Moultrie County
- 61937 also Moultrie County
- 62501
- 62513 also Christian County
- 62514
- 62521
- 62522
- 62523
- 62526
- 62532
- 62535
- 62537
- 62539 also Sangamon County
- 62543 also Logan County
- 62544
- 62547 also Christian County
- 62549
- 62550 also Shelby and Christian counties
- 62551
- 62554
- 62573
Population of Macon County, 2020–2025
Macon County shrank by 4,695 people (−4.5%) between April 2020 and July 2025: 1,517 more deaths than births and a net loss of 3,184 people from migration.
| Year (July 1) | Population |
|---|---|
| 2020 | 103,761 |
| 2021 | 102,575 |
| 2022 | 101,182 |
| 2023 | 100,364 |
| 2024 | 99,949 |
| 2025 | 99,300 |
Neighboring counties
- Christian County southwest · 33,443 people
- De Witt County north · 15,118 people
- Piatt County northeast · 16,791 people
- Moultrie County southeast · 14,371 people
- Logan County northwest · 27,182 people
- Shelby County south · 20,576 people
- Sangamon County west · 194,170 people
Printable Macon 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) (97 KB)
- PNG (2400 px) (73 KB)
Paste this code to embed the map on your site:
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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