ZIP code · Humboldt · Minnesota · United States
ZIP code 56731 — Humboldt
ZIP code 56731 serves Humboldt, Minnesota.
- Postal code
- 56731Single source Value from one source, not cross-checked.
- City
- Humboldt
- County
- Kittson FIPS 27069
- State
- Minnesota
- Country
- United States
- Coordinates
- 48.9211, -97.0934 — precision precise (locality)
View on OpenStreetMap - Population
- 126 (ZCTA, ACS 5-year)
- Population density
- 3 / sq mi
- Land area
- 38.5 sq mi (99.6 km²) (ZCTA, ACS 5-year)
- Median household income
- $58,750
- Per-capita income
- $30,406
- Median age
- 52.6
- Households
- 64
- Housing units
- 69
- Median home value
- $135,000
- Congressional district
- MN-7 (119th Congress)
- USDA hardiness zone
- 3b (-35 to -30 °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 56731 with another ZIP · ZIPs within 25 miles · distance from 56731
Map of ZIP code 56731
Climate — monthly normals
Warmest month Jul (avg high 79°F), coldest Jan (avg low -5°F).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 13 | 18 | 31 | 50 | 65 | 75 | 79 | 78 | 69 | 52 | 34 | 20 |
| Avg low °F | -5 | -2 | 13 | 29 | 42 | 53 | 57 | 54 | 45 | 32 | 18 | 4 |
| Precip in | 0.5 | 0.4 | 0.8 | 1.1 | 3.2 | 4.1 | 3.3 | 2.6 | 2.8 | 1.8 | 0.9 | 0.6 |
NOAA 1991–2020 climate normals from the nearest station: PEMBINA (7.6 mi) · NOAA NCEI
Places in ZIP 56731
- 1 parks
- 1 post offices
- 1 places of worship
- 1 gas 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