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Union, MO

City in Franklin County, Missouri. ZIP codes: 63084.

Population

12,781

Land area

9.1sq mi

People per sq mi

1,406

ZIP codes

1

Union and its ZIP codes

Full map

Union at a glance

  • Union is about 16 times as dense as Missouri as a whole.
  • By population, it ranks 73rd among 1,062 cities and towns in Missouri.
  • The median household income is $73,435, 4% above the Missouri median of $70,702.
  • A typical owner-occupied home is valued at $205,200 (11% below Missouri) and median rent is $858 a month.

Local data for Union, MO

Counts from official public data

Housing and community stats

Union, MO, American Community Survey 2020-2024

Full profile

Median household income

$73,435

Poverty rate

8.1%

Median home value

$205,200

Median rent

$858/mo

Homeownership

60.6%

Bachelor's or higher

23.7%

Median age

33.3

Average commute

24.2 min

Largest reported origins and ancestries: German Americans (3,563), Irish Americans (1,826), Italian Americans (404).

Home values and rentsIncome, education and commute

Economy and federal money

Jobs, pay, income and spending are for Franklin County. PPP loans are for Union.

Details

Unemployment rate

3.6%

Aug 2026, -0.3 pts in a year

Average annual pay

$53,591

39,757 jobs, 2025

Income per person

$59,071

BEA, 2024

Federal spending

$733M

FY 2026, $7,002 per person

Franklin County economyFederal spending

How people get to work

Union, MO, workers 16 and older. American Community Survey 5-year estimates

  • Drove alone79.0%
  • Carpooled9.2%
  • Public transit0.7%
  • Walked1.0%
  • Bicycle0.0%
  • Taxi, ride-hailing, motorcycle or other1.3%
  • Worked from home9.0%

Average one-way commute: 24.2 minutes for people who do not work from home.

Environment and hazard risk

Union, MO, from FEMA, NOAA and EPA

Full report

Natural hazard risk

Relatively Moderate

Top: strong wind

Storm events since 1996

721

Countywide, mostly hail

Flood insurance policies

156

0.3% of homes, county

July high / Jan low

91° / 23°F

45.0 inches of rain a year

Hazards, floods and storm historyCheck a flood zone

Health statistics

Share of adults in Union, MO, CDC PLACES estimates

All 40 measures

Obesity

38.9%

U.S. 33.3% +5.6 pts

Diabetes

10.3%

U.S. 12.1% -1.8 pts

Smoking

16.3%

U.S. 12.8% +3.5 pts

Uninsured (18-64)

8.5%

U.S. 11.1% -2.6 pts

ZIP codes in Union

1 in or overlapping Union. Population shown

·

Cities near Union

NameDistanceLand area (sq mi)
St. ClairCity6.7 mi4.8
Villa RidgeCensus-designated place7 mi4.9
ParkwayVillage7.5 mi0.5
WashingtonCity8 mi10
Lake St. ClairCensus-designated place8.1 mi0.7
Three CreeksVillage9.5 mi4.8
Gray SummitCensus-designated place9.9 mi7.7
AugustaTown11 mi0.9
CharmwoodTown12 mi0.1
LeslieVillage12 mi0.2
StantonCensus-designated place13 mi3.3
MarthasvilleCity13 mi0.9
PacificCity13 mi6.9
Miramiguoa ParkVillage14 mi0.4
Lake TekakwithaVillage16 mi0.2
New HavenCity16 mi3.2

Frequently asked questions

What county is Union, MO in?
Union is in Franklin County, Missouri.
What ZIP codes are in Union, MO?
ZIP codes in or overlapping Union include 63084.
What is the population of Union, MO?
About 12,781 people live in Union, based on American Community Survey 5-year estimates.
What cities are near Union?
Nearby places include St. Clair (6.7 mi), Villa Ridge (7 mi), Parkway (7.5 mi), Washington (8 mi), Lake St. Clair (8.1 mi).

Source: U.S. Census Bureau (TIGER/Line boundaries, American Community Survey) · Data as of 12/31/2023