ZIP code · Red Oak · Iowa · United States
ZIP code 51591 — Red Oak
ZIP code 51591 serves Red Oak, Iowa.
- Postal code
- 51591Single source Value from one source, not cross-checked.
- City
- Red Oak
- County
- Montgomery
- State
- Iowa
- Country
- United States
- Coordinates
- 41.0303, -95.1562 — precision precise (locality)
View on OpenStreetMap - 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.
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. Data generated on 2026-08-21. Methodology · Report an error on this page