ZIP code · Mahnomen · Minnesota · United States
ZIP code 56557 — Mahnomen
ZIP code 56557 serves Mahnomen, Minnesota.
- Postal code
- 56557Single source Value from one source, not cross-checked.
- City
- Mahnomen
- County
- Mahnomen FIPS 27087
- State
- Minnesota
- Country
- United States
- Coordinates
- 47.3362, -95.8856 — precision precise (locality)
View on OpenStreetMap - Population
- 2,797 (ZCTA, ACS 5-year)
- Population density
- 12 / sq mi
- Land area
- 234.9 sq mi (608.5 km²) (ZCTA, ACS 5-year)
- Median household income
- $53,077
- Per-capita income
- $25,100
- Median age
- 36.3
- Households
- 958
- Housing units
- 1,161
- Median home value
- $121,100
- Median gross rent
- $697 / month
- Congressional districts
- MN-8 (also MN-7) (119th Congress)
- USDA hardiness zone
- 4a (-30 to -25 °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
- 218Telephone 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 56557 with another ZIP · ZIPs within 25 miles · distance from 56557
Map of ZIP code 56557
Climate — monthly normals
Warmest month Jul (avg high 79°F), coldest Jan (avg low -3°F).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 15 | 21 | 34 | 52 | 66 | 74 | 79 | 78 | 69 | 54 | 34 | 22 |
| Avg low °F | -3 | 2 | 15 | 30 | 43 | 54 | 58 | 55 | 47 | 34 | 20 | 6 |
| Precip in | 0.8 | 0.7 | 1.1 | 1.7 | 3.1 | 4.7 | 3.8 | 3.4 | 2.8 | 2.3 | 1.0 | 1.1 |
NOAA 1991–2020 climate normals from the nearest station: MAHNOMEN (4.2 mi) · NOAA NCEI
Places in ZIP 56557
- 1 schools
- 1 colleges & universities
- 3 hospitals & clinics
- 1 restaurants & cafés
- 1 parks
- 4 playgrounds
- 1 libraries
- 1 post offices
- 2 places of worship
- 3 gas stations
- 1 EV charging stations
- 1 police & fire stations
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