ZIP Codes of Hamilton County, IL

Population & People
Population & People
Total Population
7,850
Household Income
Household Income
Median Income
$77,627
Housing
Housing
Total Housing Units
3,782
Business & Economy
Business & Economy
Total Businesses
178
Employment
Employment
Employment Rate
56.75%
Education
Education
Bachelor's Degree+
20.50%
Source: U.S. Census ACS 2024 5-Year Estimates · rolled up across the 5 ZIPs in this county.
Data Last Updated: July 1, 2026
ZIP Codes:5 ZIP Codes (4 Standard, 1 PO Box, 0 Unique) [See All]
Area Codes:618 / 730
Timezone:Central (GMT -06:00)
Local Time:11:53:18 PM
Population:7,850 [See All]
FIPS:17065
Land Area:385 sq mi
Water Area:1 sq mi
Coordinates:38.0543, -88.5635
Quick Link:
https://www.zip-codes.com/county/il-hamilton.asp
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Illinois's #89 most populous county
7,850 residents across 5 ZIPs — #89 of 102 Illinois counties.

Standout ZIPs in this County


Most Populous
Mc Leansboro · 5,004 people
63.7% of county total
Highest Income
Broughton · $105,625 median
1.4× county average
Largest Land Area
Mc Leansboro · 208.9 sq mi
Spans the most ground
Fastest Growth
Dahlgren · 28.7% (10-yr)
1,399 → 1,801 residents
Most Educated
Mc Leansboro · 25.4% bachelor's+
925 of 3,641 adults 25+

Things worth knowing about Hamilton County


7,850 residents live across 5 ZIPs covering 385 sq mi, served by 5 distinct USPS-recognized cities.

Population moved from 8,213 to 7,850 from 2014 to 2024 — a -4.4% change. 1 ZIPs gained residents, 4 lost.

The county's wealthiest ZIP 62817 (Broughton, $105,625 median) and poorest ZIP 62859 (Mc Leansboro, $54,011) are 9.9 miles apart — a 2.0× income gap across local geography.

Median home values vary 4.8× across this county — from $93,900 in 62859 (Mc Leansboro) to $453,200 in 62817 (Broughton).

Density varies across the county — from 10 people/sq mi in 62817 (Broughton) to 24 in 62828 (Dahlgren).

Educational attainment ranges from 9.0% bachelor's+ in 62828 (Dahlgren) to 25.4% in 62859 (Mc Leansboro) — the breadth of educational profiles across the area.

Within Illinois, this is the #89 most populous of 102 counties and ranks #34 for median household income .

Weighted by population, the typical household earns about $63,326 across the county — reflecting what a typical resident sees, not a simple ZIP average.

20.5% of adults age 25+ hold a bachelor's degree or higher (1,135 of 5,536 reporting).

4 Standard delivery, 1 PO Box only, 0 single-entity Unique ZIPs serve this county.

Stories about Hamilton County


Single-ZIP anchor

One ZIP holds the majority of this county's population — a sign of a county built around a single city or town.

Mc Leansboro

All ZIP Codes in Hamilton County


ZIPCityTypePopulationMedian IncomeArea (sq mi)10-yr Growth
62859Mc LeansboroStandard5,004$54,011208.9-9.5%
62828DahlgrenStandard1,801$70,58374.728.7%
62817BroughtonStandard639$105,62565.9-6.7%
62860MacedoniaStandard384$80,28835.9-29.0%
62829DalePO Box220.0-61.4%

Adjacent & Nearby Counties