ZIP Codes of Cass County, IL

Population & People
Population & People
Total Population
13,328
Household Income
Household Income
Median Income
$67,937
Housing
Housing
Total Housing Units
5,967
Business & Economy
Business & Economy
Total Businesses
256
Employment
Employment
Employment Rate
55.92%
Education
Education
Bachelor's Degree+
19.89%
Source: U.S. Census ACS 2024 5-Year Estimates · rolled up across the 6 ZIPs in this county.
Data Last Updated: July 1, 2026
ZIP Codes:6 ZIP Codes (5 Standard, 1 PO Box, 0 Unique) [See All]
Area Codes:217 / 447
Timezone:Central (GMT -06:00)
Local Time:11:53:16 PM
Population:13,328 [See All]
FIPS:17017
Land Area:456 sq mi
Water Area:10 sq mi
Coordinates:39.9645, -90.2531
Quick Link:
https://www.zip-codes.com/county/il-cass.asp
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Among America's 50 most Hispanic-majority counties
0.5% Hispanic or Latino — #22 nationwide.

Standout ZIPs in this County


Most Populous
Beardstown · 7,428 people
55.7% of county total
Highest Income
Virginia · $78,798 median
1.2× county average
Largest Land Area
Virginia · 111.4 sq mi
Spans the most ground
Fastest Growth
Virginia · 12.9% (10-yr)
2,080 → 2,349 residents
Most Educated
Virginia · 19.6% bachelor's+
336 of 1,715 adults 25+

Things worth knowing about Cass County


13,328 residents live across 6 ZIPs covering 456 sq mi, served by 6 distinct USPS-recognized cities.

Population moved from 14,060 to 13,328 from 2014 to 2024 — a -5.2% change. 2 ZIPs gained residents, 4 lost.

The county's wealthiest ZIP 62691 (Virginia, $78,798 median) and poorest ZIP 62611 (Arenzville, $62,875) are 11.5 miles apart — a 1.3× income gap across local geography.

Median home values vary 1.9× across this county — from $84,300 in 62627 (Chandlerville) to $159,800 in 62611 (Arenzville).

Density varies across the county — from 11 people/sq mi in 62627 (Chandlerville) to 77 in 62618 (Beardstown).

Educational attainment ranges from 15.1% bachelor's+ in 62627 (Chandlerville) to 35.7% in 62611 (Arenzville) — the breadth of educational profiles across the area.

Within Illinois, this is the #80 most populous of 102 counties and ranks #68 for median household income .

Weighted by population, the typical household earns about $67,747 across the county — reflecting what a typical resident sees, not a simple ZIP average.

19.9% of adults age 25+ hold a bachelor's degree or higher (1,807 of 9,087 reporting).

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

Stories about Cass County


Population decline

Cass County lost 5.2% of residents between 2014 and 2024. ZIPs that shed the largest share:

Ashland
-18.6%
1,718 → 1,398 residents
Arenzville
-12.5%
1,196 → 1,047 residents

All ZIP Codes in Cass County


ZIPCityTypePopulationMedian IncomeArea (sq mi)10-yr Growth
62618BeardstownStandard7,428$65,20896.5-7.1%
62691VirginiaStandard2,349$78,798111.412.9%
62612AshlandStandard1,398$69,56987.4-18.6%
62611ArenzvilleStandard1,047$62,87572.5-12.5%
62627ChandlervilleStandard1,006$63,23588.3-5.8%
62622Bluff SpringsPO Box1000.0

Adjacent & Nearby Counties