ZIP code · Grafton · Iowa · United States
ZIP code 50440 — Grafton
ZIP code 50440 serves Grafton, Iowa.
- Postal code
- 50440Single source Value from one source, not cross-checked.
- City
- Grafton
- County
- Worth FIPS 19195
- State
- Iowa
- Country
- United States
- Coordinates
- 43.3110, -93.0797 — precision precise (locality)
View on OpenStreetMap - Population
- 275 (ZCTA, ACS 5-year)
- Population density
- 9 / sq mi
- Land area
- 29.2 sq mi (75.6 km²) (ZCTA, ACS 5-year)
- Median household income
- $58,750
- Per-capita income
- $36,691
- Median age
- 49.9
- Households
- 144
- Housing units
- 159
- Median home value
- $99,300
- Median gross rent
- $655 / month
- Congressional district
- IA-2 (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 50440 with another ZIP · ZIPs within 25 miles · distance from 50440
Map of ZIP code 50440
Climate — monthly normals
Warmest month Jul (avg high 79°F), coldest Jan (avg low 4°F).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 21 | 26 | 38 | 54 | 66 | 76 | 79 | 76 | 71 | 57 | 41 | 27 |
| Avg low °F | 4 | 8 | 21 | 33 | 45 | 56 | 59 | 57 | 48 | 35 | 23 | 11 |
| Precip in | 1.1 | 1.0 | 2.0 | 3.8 | 4.8 | 5.1 | 4.7 | 3.9 | 3.3 | 2.7 | 1.7 | 1.3 |
NOAA 1991–2020 climate normals from the nearest station: NORTHWOOD (11.4 mi) · NOAA NCEI
Places in ZIP 50440
- 1 parks
- 1 playgrounds
- 1 libraries
- 1 post offices
- 1 places of worship
- 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