ZIP code · Randolph · Iowa · United States
ZIP code 51649 — Randolph
ZIP code 51649 serves Randolph, Iowa.
- Postal code
- 51649Single source Value from one source, not cross-checked.
- City
- Randolph
- County
- Fremont FIPS 19071
- State
- Iowa
- Country
- United States
- Coordinates
- 40.8704, -95.5624 — precision precise (locality)
View on OpenStreetMap - Population
- 416 (ZCTA, ACS 5-year)
- Population density
- 10 / sq mi
- Land area
- 42.1 sq mi (109.1 km²) (ZCTA, ACS 5-year)
- Median household income
- $90,781
- Per-capita income
- $42,535
- Median age
- 48.5
- Households
- 138
- Housing units
- 146
- Median home value
- $175,900
- Median gross rent
- $1,087 / month
- Congressional district
- IA-4 (119th Congress)
- USDA hardiness zone
- 5b (-15 to -10 °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
- 712Telephone 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 51649 with another ZIP · ZIPs within 25 miles · distance from 51649
Map of ZIP code 51649
Climate — monthly normals
Warmest month Jul (avg high 86°F), coldest Jan (avg low 13°F).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 33 | 38 | 51 | 63 | 73 | 82 | 86 | 84 | 78 | 65 | 50 | 37 |
| Avg low °F | 13 | 17 | 28 | 39 | 51 | 61 | 65 | 63 | 54 | 42 | 29 | 19 |
| Precip in | 0.8 | 1.0 | 1.9 | 3.1 | 5.3 | 4.8 | 4.5 | 3.3 | 3.1 | 2.7 | 1.6 | 1.2 |
NOAA 1991–2020 climate normals from the nearest station: SIDNEY 1SSE (10.2 mi) · NOAA NCEI
Places in ZIP 51649
- 1 post offices
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