| ZIP Codes: | 18 ZIP Codes (13 Standard, 5 PO Box, 0 Unique) [See All] |
| Area Codes: | 217 / 447 |
| Timezone: | Central (GMT -06:00) |
| Local Time: | 11:53:19 PM |
| Population: | 101,329 [See All] |
| FIPS: | 17115 |
| CBSA: | Decatur, IL |
| Land Area: | 540 sq mi |
| Water Area: | 5 sq mi |
| Coordinates: | 39.8544, -88.9847 |
| Quick Link: |
101,329 residents live across 18 ZIPs covering 540 sq mi, served by 13 distinct USPS-recognized cities.
Population moved from 109,253 to 101,329 from 2014 to 2024 — a -7.3% change. 6 ZIPs gained residents, 10 lost.
The county's wealthiest ZIP 62535 (Forsyth, $112,000 median) and poorest ZIP 62523 (Decatur, $13,393) are 5.9 miles apart — a 8.4× income gap across local geography.
Median home values vary 3.0× across this county — from $95,100 in 62526 (Decatur) to $281,000 in 62535 (Forsyth).
Density varies 83× across the county — from 20 people/sq mi in 62573 (Warrensburg) to 1,692 in 62523 (Decatur).
Educational attainment ranges from 3.0% bachelor's+ in 62523 (Decatur) to 59.3% in 62535 (Forsyth) — the breadth of educational profiles across the area.
Within Illinois, this is the #20 most populous of 102 counties and ranks #41 for median household income .
Weighted by population, the typical household earns about $64,816 across the county — reflecting what a typical resident sees, not a simple ZIP average.
24.4% of adults age 25+ hold a bachelor's degree or higher (17,025 of 69,798 reporting).
13 Standard delivery, 5 PO Box only, 0 single-entity Unique ZIPs serve this county.
Median household income spans 8.4× between the wealthiest and poorest ZIPs — a sign of significant intra-county inequality.
Macon County lost 7.3% of residents between 2014 and 2024. ZIPs that shed the largest share:
| ZIP | City | Type | Population | Median Income | Area (sq mi) | 10-yr Growth |
|---|---|---|---|---|---|---|
| 62521 | Decatur | Standard | 32,665 | $66,337 | 71.4 | -8.7% |
| 62526 | Decatur | Standard | 30,483 | $49,062 | 51.3 | -9.0% |
| 62522 | Decatur | Standard | 15,185 | $50,669 | 24.0 | -8.2% |
| 62549 | Mt Zion | Standard | 6,454 | $100,566 | 7.7 | 6.3% |
| 62535 | Forsyth | Standard | 3,502 | $112,000 | 4.6 | -7.4% |
| 61756 | Maroa | Standard | 2,542 | $86,375 | 82.3 | 12.4% |
| 62501 | Argenta | Standard | 2,324 | $95,889 | 69.9 | -7.9% |
| 62554 | Oreana | Standard | 1,832 | $95,625 | 18.6 | 12.0% |
| 62544 | Macon | Standard | 1,668 | $89,167 | 65.7 | -17.4% |
| 62513 | Blue Mound | Standard | 1,391 | $83,125 | 68.1 | -13.0% |
| 62573 | Warrensburg | Standard | 1,147 | $94,583 | 56.5 | -22.0% |
| 62551 | Niantic | Standard | 820 | $69,583 | 18.7 | 8.6% |
| 62523 | Decatur | Standard | 707 | $13,393 | 0.4 | -30.1% |
| 62514 | Boody | PO Box | 297 | $53,333 | 0.2 | 52.3% |
| 62537 | Harristown | PO Box | 272 | $70,455 | 0.2 | 444.0% |
| 62532 | Elwin | PO Box | 40 | — | 0.0 | -47.4% |
| 62525 | Decatur | PO Box | — | — | 0.0 | — |
| 62524 | Decatur | PO Box | — | — | 0.0 | — |