Union
City in Franklin County, Missouri

Union is a city in Franklin County, Missouri, with 12,348 residents (2020 Census). It sits at 531 ft (162 m) above sea level. The nearest town is St. Clair, 6.3 miles S.
- 12,348residents (2020 Census)
- 531 ftelevation · 162 m
- 9.1 sq miland area · 23.5 km²
- 1,359 / sq mipopulation density
- 63084ZIP code
About Union
Union is a city in and the county seat of Franklin County, Missouri, United States. It is located on the Bourbeuse River, 50 miles (80 km) southwest of St. Louis. The population was 12,348 at the 2020 census and predicted to be around at 13,507 in 2026.
Text: Wikipedia · CC BY-SA 4.0
Union weather: 7-day forecast
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Source: National Weather Service (NOAA).
Nearest webcams to Union
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Webcams: Windy.com
Living in Union
- Median household income
- $73,435
- Median home value
- $205,200
- Median rent
- $858/mo
- Median age
- 33.3
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Map of Union
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Open in Google Maps ›Union, MO population
Union had 12,348 residents in the 2020 Census.
| 2020 Census | 12,348 |
|---|---|
| Density | 1,359 per sq mi (525 per km²) |
Source: U.S. Census Bureau, Decennial Census.
Union at a glance
| State | Missouri (MO) |
|---|---|
| County | Franklin County |
| Type | City |
| Population | 12,348 (2020) |
| Land area | 9.09 sq mi (23.5 km²) |
| Elevation | 531 ft (162 m) |
| Coordinates | 38.4378° N, 90.9958° W |
| ZIP code | 63084 |
| Official website | unionmissouri.org |
| Census code (GEOID) | 2974626 |
Sources: U.S. Census Bureau (Gazetteer, ZCTA), USGS GNIS, Wikidata.
Towns near Union
- St. Clair6.3 mi S
- Villa Ridge6.4 mi E
- Parkway7.2 mi S
- Lake St. Clair7.9 mi S
- Washington8.0 mi N
- Three Creeks9.2 mi N
- Gray Summit10.1 mi NE
- Augusta11.1 mi NE
- Charmwood12.1 mi SW
- Leslie12.8 mi W
- Stanton13.0 mi SW
- Pacific13.6 mi E
Straight-line distance between town centers.
Frequently asked questions about Union
What county is Union in?
Union is in Franklin County, Missouri.
What is the population of Union, MO?
12,348 people lived in Union at the 2020 Census.
What is the ZIP code of Union, MO?
The ZIP code of Union is 63084.
What is the elevation of Union?
531 feet (162 m) above sea level.
What towns are near Union?
St. Clair (6.3 mi), Villa Ridge (6.4 mi), Parkway (7.2 mi), Lake St. Clair (7.9 mi), Washington (8.0 mi).
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