ZIP Codes of Johnson County, IL

Population & People
Population & People
Total Population
14,174
Household Income
Household Income
Median Income
$66,900
Housing
Housing
Total Housing Units
5,846
Business & Economy
Business & Economy
Total Businesses
183
Employment
Employment
Employment Rate
41.18%
Education
Education
Bachelor's Degree+
19.43%
Source: U.S. Census ACS 2024 5-Year Estimates · rolled up across the 9 ZIPs in this county.
Data Last Updated: June 1, 2026
ZIP Codes:9 ZIP Codes (9 Standard, 0 PO Box, 0 Unique) [See All]
Area Codes:618 / 730
Timezone:Central (GMT -06:00)
Local Time:2:12:01 PM
Population:14,174 [See All]
FIPS:17087
Land Area:416 sq mi
Water Area:5 sq mi
Coordinates:37.4590, -88.8721
Quick Link:
https://www.zip-codes.com/county/il-johnson.asp
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Extreme geographic sprawl
The largest ZIP spans 660× the smallest by area — 119.3 sq mi down to 0.18.
Striking education divide
Bachelor's share spans 5.0% to 41.4% — a 36-point gap.

Standout ZIPs in this County


Most Populous
Vienna · 6,339 people
44.7% of county total
Highest Income
Ozark · $84,175 median
1.3× county average
Largest Land Area
Vienna · 119.3 sq mi
Spans the most ground
Fastest Growth
Buncombe · 25.2% (10-yr)
1,210 → 1,515 residents
Most Educated
Goreville · 41.4% bachelor's+
877 of 2,116 adults 25+

Things worth knowing about Johnson County


14,174 residents live across 9 ZIPs covering 416 sq mi, served by 9 distinct USPS-recognized cities.

Population moved from 13,312 to 14,174 from 2014 to 2024 — a +6.5% change. 4 ZIPs gained residents, 4 lost.

The county's wealthiest ZIP 62972 (Ozark, $84,175 median) and poorest ZIP 62995 (Vienna, $49,744) are 9.2 miles apart — a 1.7× income gap across local geography.

Median home values vary 2.4× across this county — from $78,600 in 62923 (Cypress) to $188,800 in 62972 (Ozark).

Density varies across the county — from 12 people/sq mi in 62943 (Grantsburg) to 59 in 62939 (Goreville).

Educational attainment ranges from 5.0% bachelor's+ in 62923 (Cypress) to 41.4% in 62939 (Goreville) — the breadth of educational profiles across the area.

Within Illinois, this is the #76 most populous of 102 counties and ranks #71 for median household income with the #3 fastest decade growth .

Weighted by population, the typical household earns about $60,457 across the county — reflecting what a typical resident sees, not a simple ZIP average.

19.4% of adults age 25+ hold a bachelor's degree or higher (1,957 of 10,073 reporting).

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

All ZIP Codes in Johnson County


ZIPCityTypePopulationMedian IncomeArea (sq mi)10-yr Growth
62995ViennaStandard6,339$49,744119.323.1%
62939GorevilleStandard2,958$65,75050.0-8.1%
62912BuncombeStandard1,515$63,75048.925.2%
62985SimpsonStandard1,128$74,37569.9-8.5%
62972OzarkStandard1,056$84,17562.13.2%
62923CypressStandard441$51,80621.7-13.5%
62943GrantsburgStandard428$83,19435.3-36.7%
62967New BurnsideStandard309$62,4048.75.5%
62909BolesStandard0.2

Adjacent & Nearby Counties