ZIP Codes of Hardin County, IL

Population & People
Population & People
Total Population
3,183
Household Income
Household Income
Median Income
$52,432
Housing
Housing
Total Housing Units
1,993
Business & Economy
Business & Economy
Total Businesses
51
Employment
Employment
Employment Rate
39.59%
Education
Education
Bachelor's Degree+
13.39%
Source: U.S. Census ACS 2024 5-Year Estimates · rolled up across the 3 ZIPs in this county.
Data Last Updated: July 1, 2026
ZIP Codes:3 ZIP Codes (3 Standard, 0 PO Box, 0 Unique) [See All]
Area Codes:618 / 730
Timezone:Central (GMT -06:00)
Local Time:11:53:18 PM
Population:3,183 [See All]
FIPS:17069
Land Area:159 sq mi
Water Area:4 sq mi
Coordinates:37.4966, -88.2637
Quick Link:
https://www.zip-codes.com/county/il-hardin.asp
Need Hardin data in your app? Look up ZIP, county, and city data with a single API call.
Try Free
Notable population decline
Lost 15.7% of residents since 2014.
Among Illinois's 5 oldest counties
Median age 52.0.

Standout ZIPs in this County


Most Populous
Elizabethtown · 1,348 people
42.3% of county total
Highest Income
Cave In Rock · $63,942 median
1.2× county average
Largest Land Area
Elizabethtown · 98.8 sq mi
Spans the most ground
Fastest Growth
Elizabethtown · -4.0% (10-yr)
1,404 → 1,348 residents
Most Educated
Elizabethtown · 12.0% bachelor's+
127 of 1,060 adults 25+

Things worth knowing about Hardin County


3,183 residents live across 3 ZIPs covering 159 sq mi, served by 3 distinct USPS-recognized cities.

Population moved from 3,777 to 3,183 from 2014 to 2024 — a -15.7% change. 0 ZIPs gained residents, 3 lost.

The county's wealthiest ZIP 62919 (Cave In Rock, $63,942 median) and poorest ZIP 62982 (Rosiclare, $43,750) are 13.8 miles apart — a 1.5× income gap across local geography.

Median home values vary 2.6× across this county — from $61,300 in 62982 (Rosiclare) to $161,900 in 62919 (Cave In Rock).

Density varies across the county — from 14 people/sq mi in 62931 (Elizabethtown) to 115 in 62982 (Rosiclare).

Educational attainment ranges from 12.0% bachelor's+ in 62931 (Elizabethtown) to 15.2% in 62982 (Rosiclare) — the breadth of educational profiles across the area.

Within Illinois, this is the #101 most populous of 102 counties and ranks #98 for median household income .

Weighted by population, the typical household earns about $51,425 across the county — reflecting what a typical resident sees, not a simple ZIP average.

13.4% of adults age 25+ hold a bachelor's degree or higher (334 of 2,495 reporting).

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

Stories about Hardin County


Population decline

Hardin County lost 15.7% of residents between 2014 and 2024. ZIPs that shed the largest share:

Rosiclare
-24.9%
1,352 → 1,016 residents
Cave In Rock
-19.8%
1,021 → 819 residents

All ZIP Codes in Hardin County


ZIPCityTypePopulationMedian IncomeArea (sq mi)10-yr Growth
62931ElizabethtownStandard1,348$49,60598.8-4.0%
62982RosiclareStandard1,016$43,7508.9-24.9%
62919Cave In RockStandard819$63,94250.9-19.8%

Adjacent & Nearby Counties