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

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zipcodes.pro — CITY/MO/UNION

Union ZIP code, Missouri

The ZIP code for Union, MO is 63084, and its area code is 636.

USPS city name
1 ZIP code
Population
12,781
Area code
636

Union in numbers

About 12,781 people live in Union, in 4,990 households. The median household income is $73,435 a year, 4% above the Missouri median of $70,702 (US: $80,734). The median owner-occupied home is valued at $205,200 (11% below the Missouri median), and median gross rent is $858 a month. The median age is 33.3; 23.7% of adults 25 and over hold a bachelor's degree or higher (32.4% across Missouri); the average commute takes 24 minutes.

Population12,781Union12,781
Households4,990Union4,990
Median age33.3Union33.3Missouri39.0US 38.9
Median household income$73,435Union$73,435Missouri$70,702US $80,734
Median home value$205,200Union$205,200Missouri$230,300US $332,700
Median gross rent$858Union$858Missouri$1,033US $1,413
Bachelor's degree or higher23.7%Union23.7%Missouri32.4%US 35.7%
Mean commute24.2 minUnion24.2 minMissouri23.5 minUS 26.4 min
Population density1,406 / sq miUnion1,406 / sq mi

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

ZIP codes addressed as Union

ZIP codes with the USPS city name Union
ZIP City Type Population Median income Median home
63084 Union , MO Standard 20,708 $75,992 $226,900

Map of Union ZIP codes

63084

The ZIP codes of Union, MO, 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.

Towns near Union

The nearest larger towns are Washington (15,130 people, 8.0 mi), Eureka (13,081 people, 19 mi) and Wildwood (35,133 people, 20 mi).

Towns near Union
TownPopulationDistance
St. Clair 4,789 6.3 mi
Villa Ridge 2,835 6.4 mi
Washington 15,130 8.0 mi
Gray Summit 2,991 10.1 mi
Pacific 7,475 13.6 mi
New Haven 3,302 16.6 mi
Sullivan 6,310 18.0 mi
Eureka 13,081 19.4 mi
Wildwood 35,133 20.2 mi
Byrnes Mill 3,189 22.8 mi
Ellisville 10,002 24.4 mi
High Ridge 3,714 25.0 mi
Clarkson Valley 2,584 25.3 mi
Dardenne Prairie 13,503 25.9 mi

More nearby: every ZIP code in Franklin County · Missouri ZIP codes

Cite this page

zipcodes.pro. “Union, MO ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/city/mo/union

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