ZIP code · Red Oak · Iowa · United States
ZIP code 51566 — Red Oak
ZIP code 51566 serves Red Oak, Iowa.
- Postal code
- 51566Single source Value from one source, not cross-checked.
- City
- Red Oak
- County
- Montgomery FIPS 19137
- State
- Iowa
- Country
- United States
- Coordinates
- 41.0079, -95.2269 — precision precise (locality)
View on OpenStreetMap - Population
- 7,004 (ZCTA, ACS 5-year)
- Population density
- 40 / sq mi
- Land area
- 176.4 sq mi (456.9 km²) (ZCTA, ACS 5-year)
- Median household income
- $58,264
- Per-capita income
- $37,864
- Median age
- 42.6
- Households
- 3,159
- Housing units
- 3,435
- Median home value
- $116,200
- Median gross rent
- $783 / month
- Congressional districts
- IA-3 (also 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 51566 with another ZIP · ZIPs within 25 miles · distance from 51566
Map of ZIP code 51566
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 | 83 | 86 | 85 | 78 | 66 | 50 | 37 |
| Avg low °F | 13 | 16 | 28 | 38 | 51 | 61 | 66 | 63 | 53 | 41 | 28 | 18 |
| Precip in | 0.9 | 1.1 | 2.0 | 3.8 | 6.0 | 5.4 | 4.0 | 3.9 | 3.6 | 3.3 | 1.9 | 1.4 |
NOAA 1991–2020 climate normals from the nearest station: RED OAK (0.8 mi) · NOAA NCEI
Places in ZIP 51566
- 5 schools
- 1 colleges & universities
- 1 hospitals & clinics
- 5 doctors & dentists
- 1 pharmacies
- 3 supermarkets
- 10 restaurants & cafés
- 7 parks
- 4 playgrounds
- 1 libraries
- 1 post offices
- 21 places of worship
- 3 banks
- 8 gas stations
- 1 EV charging stations
- 3 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