Union Star is a city in northwest DeKalb County, Missouri, United States, along the Third Fork Platte River. The population was 380 at the 2020 census. It is part of the St. Joseph, MO–KS Metropolitan Statistical Area.

From Wikipedia, licensed CC BY-SA 4.0 · facts via Wikidata (CC0)

Town numbers

ZIP code64494

Area code816

Living in Union Star

Housing in Union Star

$181K▲ 0.9% in a year Typical home value · Zillow

The typical Union Star home is worth about $181,000, up 0.9% in a year, 32% below the Missouri typical home.

Zillow Home Value Index · Redfin Data CenterHousing market →

Work & commute in Union Star

Full picture →

Most working residents leave Union Star for work: only 0% work in town. The top destinations are St. Joseph (36%), Kansas City (8%) and Stewartsville (5%). Half commute less than 23 miles.

St. Joseph

36%

Kansas City

Stewartsville

Cameron

0%Work in townlive and work in Union Star 23 miWhere do people commute?the commute map 26Jobs based herea commuter town

Census LEHD 2023 · ACSWork & commute in Union Star →

Health in Union Star

Compared with Missouri

4better than MO

of 32 measures CDC estimates. The other 28 are too close to call.

Conditions all close Habits all close Care all close Mind all close Everyday needs 4▲ 0 close

BetterToo close to callWorse

What stands out

6.8%Fewer adults facing a utility shut-offMO 9% · better 10.5%Fewer adults facing food insecurityMO 13.7% · better

Care nearby

Mosaic Life Care at St. JosephSaint Joseph · 17.1 mi · ER

King City ClinicKing City · 6.4 mi · sliding-scale fees

Primary careShortage · county-wide

DentalShortage · county-wide

Mental healthShortage · county-wide

CDC PLACES 2025 · modeled estimates for adults · CDC's estimate for Union Star · CMS · HRSAHealth in Union Star →

Natural hazards in Union Star

Moderate

Expected storm and flood damage is higher than in 53% of U.S. communities.

🌊 Inland flooding🌪️ Tornadoes🌵 Drought

0Does Union Star flood?no paid flood claims on record 1Disasters that paid out herefederal disaster sent FEMA money to Union Star MapUnion Star vs. its neighborsnearby towns shaded by rating

FEMA National Risk Index December 2025 · OpenFEMANatural hazards in Union Star →

Climate in Union Star

Full climate →

Union Star has chilly winters and warm summers. A typical July afternoon reaches 87°, a January night drops to 17°, and about 18 inches of snow falls in a normal winter.

39° / 20°Winter

64° / 42°Spring

85° / 64°Summer

65° / 43°Fall