ZIP code · Union · Iowa · United States
ZIP code 50258 — Union
ZIP code 50258 serves Union, Iowa.
- Postal code
- 50258Single source Value from one source, not cross-checked.
- City
- Union
- County
- Hardin FIPS 19083
- State
- Iowa
- Country
- United States
- Coordinates
- 42.2521, -93.0562 — precision precise (locality)
View on OpenStreetMap - Population
- 989 (ZCTA, ACS 5-year)
- Population density
- 18 / sq mi
- Land area
- 54 sq mi (139.8 km²) (ZCTA, ACS 5-year)
- Median household income
- $82,865
- Per-capita income
- $35,831
- Median age
- 50.4
- Households
- 403
- Housing units
- 453
- Median home value
- $100,000
- Median gross rent
- $825 / month
- Congressional districts
- IA-2 (also IA-4) (119th Congress)
- USDA hardiness zone
- 5a (-20 to -15 °F)Planting / growing zone from the 2023 USDA Plant Hardiness Zone Map: average annual extreme minimum temperature, 1991–2020.
- Time zone
- America/Chicago (UTC−6 / UTC−5 DST)
- Area code
- 641Telephone area codes serving this ZIP (NANPA central-office assignments). A ZIP and an area code are different boundaries; at a border both codes may apply.
Tools: compare 50258 with another ZIP · ZIPs within 25 miles · distance from 50258
Map of ZIP code 50258
Climate — monthly normals
Warmest month Jul (avg high 84°F), coldest Jan (avg low 8°F).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 26 | 31 | 44 | 59 | 70 | 80 | 84 | 82 | 76 | 62 | 45 | 32 |
| Avg low °F | 8 | 13 | 24 | 35 | 48 | 59 | 62 | 59 | 51 | 38 | 26 | 15 |
| Precip in | 1.1 | 1.2 | 2.1 | 4.0 | 5.2 | 5.9 | 4.1 | 4.5 | 3.6 | 2.8 | 1.9 | 1.6 |
NOAA 1991–2020 climate normals from the nearest station: ELDORA (8.1 mi) · NOAA NCEI
Places in ZIP 50258
- 1 schools
- 7 parks
- 1 libraries
- 1 post offices
- 4 places of worship
Places mapped inside this ZIP’s ZCTA area in OpenStreetMap. OSM is community-maintained: counts reflect what has been mapped, and completeness varies by area — treat them as at-least figures. © OpenStreetMap contributors (ODbL) · Methodology
About this page
US ZIP codes have five digits. They are postal routing areas, not administrative boundaries: a ZIP can span more than one city or county, and the city shown is the primary USPS name for that code.
GeoNames · U.S. Census Bureau (ACS) · U.S. Census Bureau · NOAA NCEI · usda-phzm. Data generated on 2026-08-21. Methodology · Report an error on this page