ZIP code · Calumet · Iowa · United States
ZIP code 51009 — Calumet
ZIP code 51009 serves Calumet, Iowa.
- Postal code
- 51009Single source Value from one source, not cross-checked.
- City
- Calumet
- County
- O'Brien FIPS 19141
- State
- Iowa
- Country
- United States
- Coordinates
- 42.9444, -95.5515 — precision precise (locality)
View on OpenStreetMap - Population
- 131 (ZCTA, ACS 5-year)
- Population density
- 492 / sq mi
- Land area
- 0.3 sq mi (0.7 km²) (ZCTA, ACS 5-year)
- Median household income
- $53,125
- Per-capita income
- $39,726
- Median age
- 32.8
- Households
- 55
- Housing units
- 58
- Median home value
- $65,000
- Median gross rent
- $475 / month
- Congressional district
- 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
- 712 (from the nearest rate centre)Telephone 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 51009 with another ZIP · ZIPs within 25 miles · distance from 51009
Map of ZIP code 51009
Climate — monthly normals
Warmest month Jul (avg high 85°F), coldest Jan (avg low 9°F).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 27 | 32 | 46 | 61 | 72 | 82 | 85 | 82 | 76 | 62 | 45 | 31 |
| Avg low °F | 9 | 14 | 26 | 37 | 49 | 60 | 64 | 62 | 53 | 40 | 27 | 15 |
| Precip in | 0.8 | 0.9 | 1.7 | 3.3 | 4.1 | 5.0 | 3.9 | 3.6 | 3.3 | 2.3 | 1.5 | 1.0 |
NOAA 1991–2020 climate normals from the nearest station: PRIMGHAR (10.6 mi) · NOAA NCEI
Places in ZIP 51009
- 1 post offices
- 1 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