ZIP Codes of Macon County, IL

Population & People
Population & People
Total Population
101,329
Household Income
Household Income
Median Income
$75,344
Housing
Housing
Total Housing Units
49,467
Business & Economy
Business & Economy
Total Businesses
2,238
Employment
Employment
Employment Rate
54.06%
Education
Education
Bachelor's Degree+
24.39%
Source: U.S. Census ACS 2024 5-Year Estimates · rolled up across the 18 ZIPs in this county.
Data Last Updated: July 1, 2026
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
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Sharp income gradient
Wealthiest ZIP earns 8.4× the poorest — $112,000 vs $13,393.
Extreme education divide
Bachelor's share ranges 3.0% to 59.3% across ZIPs — a 56-point gap.
Wide geographic spread
ZIPs range from 82.3 sq mi down to 0.42 — a 197× sprawl ratio.

Standout ZIPs in this County


Most Populous
Decatur · 32,665 people
32.2% of county total
Highest Income
Forsyth · $112,000 median
1.5× county average
Largest Land Area
Maroa · 82.3 sq mi
Spans the most ground
Fastest Growth
Maroa · 12.4% (10-yr)
2,261 → 2,542 residents
Most Educated
Forsyth · 59.3% bachelor's+
1,376 of 2,319 adults 25+

Things worth knowing about Macon County


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.

Stories about Macon County


Two counties in one

Median household income spans 8.4× between the wealthiest and poorest ZIPs — a sign of significant intra-county inequality.

Wealthiest ZIP
Forsyth
Median income: $112,000
Population: 3,502
Bachelor's+: 59.3%
vs
Poorest ZIP (pop >= 500)
Decatur
Median income: $13,393
Population: 707
Bachelor's+: 3.0%
For every $1 of household income in 62523, the typical household in 62535 earns $8.36.

Population decline

Macon County lost 7.3% of residents between 2014 and 2024. ZIPs that shed the largest share:

Decatur
-30.1%
1,011 → 707 residents
Warrensburg
-22.0%
1,471 → 1,147 residents
Macon
-17.4%
2,020 → 1,668 residents
Blue Mound
-13.0%
1,599 → 1,391 residents

All ZIP Codes in Macon County


ZIPCityTypePopulationMedian IncomeArea (sq mi)10-yr Growth
62521DecaturStandard32,665$66,33771.4-8.7%
62526DecaturStandard30,483$49,06251.3-9.0%
62522DecaturStandard15,185$50,66924.0-8.2%
62549Mt ZionStandard6,454$100,5667.76.3%
62535ForsythStandard3,502$112,0004.6-7.4%
61756MaroaStandard2,542$86,37582.312.4%
62501ArgentaStandard2,324$95,88969.9-7.9%
62554OreanaStandard1,832$95,62518.612.0%
62544MaconStandard1,668$89,16765.7-17.4%
62513Blue MoundStandard1,391$83,12568.1-13.0%
62573WarrensburgStandard1,147$94,58356.5-22.0%
62551NianticStandard820$69,58318.78.6%
62523DecaturStandard707$13,3930.4-30.1%
62514BoodyPO Box297$53,3330.252.3%
62537HarristownPO Box272$70,4550.2444.0%
62532ElwinPO Box400.0-47.4%
62525DecaturPO Box0.0
62524DecaturPO Box0.0

Adjacent & Nearby Counties