Every ZIP code in the United States, with weather, radar, trivia and the numbers behind it. Five digits since 1963!

ZIP stands for Zone Improvement Plan. The codes went live on July 1, 1963.The lowest ZIP code is 00501 — the IRS in Holtsville, New York.The highest ZIP code is 99950, in Ketchikan, Alaska.Type 07734 into a calculator and turn it upside down: hELLO. It is Keansburg, New Jersey.12345 belongs to one company: General Electric in Schenectady, New York.The first digit is a region: 0 is New England and New Jersey, 9 is the West Coast, Alaska and Hawaii.Mr. ZIP, the cartoon mailman, was the mascot that sold the idea to America.ZIP+4 arrived in 1983 and can narrow a ZIP down to one side of one block.A ZIP code is a mail route, not a place: plenty of them cross county and even state lines.Play ZIP Hunt: guess the secret ZIP code of the day in six tries.
zipcodes.pro — STATE/IL/COUNTY/UNION

Union County, IL ZIP codes

There are 7 ZIP codes in Union County, IL, in 7 towns, from 62905 to 62998. The largest are 62906 (Anna), 62952 (Jonesboro) and 62920 (Cobden). 1 more crosses into it from a neighbouring county: 62912.

The county seat is Jonesboro.

ZIP codes
7
Partly in it
1 more
Towns
7
County seat
Jonesboro
County FIPS
17181
Population
16,997
Median household income
$55,728
Land area
413 sq mi

Union County ZIP codes by town

Jonesboro (county seat)
62952

Each ZIP code is listed under the county most of its land lies in and the town the Postal Service names it for; a ZIP code's own page shows exactly how it is split.

ZIP codes partly in Union County

This ZIP code lies mostly in a neighbouring county but covers a twentieth or more of Union County.

Map of Union County ZIP codes

62905629066292062926629526296162998

The ZIP codes of Union County, shaded. Outlines are Census ZIP Code Tabulation Areas (2020), which approximate the mail routes; PO-box and single-address codes have no area and are not drawn. Click any area to open its ZIP code.

Union County in numbers

About 16,997 people live in Union County, in 6,868 households, the 61st most populous of Illinois's 102 counties. The median household income is $55,728 a year, 33% below the Illinois median of $83,390 (US: $80,734). The median owner-occupied home is valued at $131,700 (50% below the Illinois median), and median gross rent is $648 a month. The median age is 44.3; 20.9% of adults 25 and over hold a bachelor's degree or higher (37.8% across Illinois); the average commute takes 24 minutes.

Population16,997Union16,997
Households6,868Union6,868
Median age44.3Union44.3Illinois39.0US 38.9
Median household income$55,728Union$55,728Illinois$83,390US $80,734
Median home value$131,700Union$131,700Illinois$263,300US $332,700
Median gross rent$648Union$648Illinois$1,274US $1,413
Bachelor's degree or higher20.9%Union20.9%Illinois37.8%US 35.7%
Mean commute24.4 minUnion24.4 minIllinois27.8 minUS 26.4 min
Population density41 / sq miUnion41 / sq mi

U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates. Survey estimates carry margins of error, wider for small places. Sources and methods.

Largest towns in Union County

Largest towns in Union County
TownZIP codesPopulation
Anna 1 4,196
Jonesboro 1 1,870
Cobden 1 1,170
Dongola 1 553
Alto Pass 1 343
Wolf Lake 1 218
Millcreek 1 37

Population of the census place of that name where there is one, otherwise of the ZIP codes the Postal Service addresses by it. A town's ZIP codes can reach past the county line.

Neighbouring counties

Counties that share a ZIP code with Union County.

Not sure you are in Union County? What county am I in? answers from your location, near a county line included.

Every ZIP code in Union County, with figures

ZIP codes in Union County
ZIP City Type Population Median income Median home
62905 Alto Pass , IL Standard 779 $52,875 $108,300
62906 Anna , IL Standard 7,329 $41,993 $145,400
62920 Cobden , IL Standard 2,959 $55,288 $153,400
62926 Dongola , IL Standard 1,998 $64,583 $113,300
62952 Jonesboro , IL Standard 2,852 $64,097 $118,600
62961 Millcreek , IL Standard 37 $151,250 —
62998 Wolf Lake , IL Standard 218 $56,300 —

Cite this page

zipcodes.pro. “Union County ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/state/il/county/union

Underlying data is public domain or openly licensed — sources, vintages and licences.