51591 ZIP Code — Red Oak, IA
Montgomery County, Iowa
ZIP code 51591 is located in Red Oak, Iowa, within Montgomery County. It covers approximately 0.00 square miles and serves a population of 0 residents. This is a standard ZIP code in the Central (CT) timezone, served by area code 712.
0
population
0.00
sq mi land
Standard
ZIP type
Central (CT)
timezone
51591 ZIP code map
Cities in ZIP code 51591
Below are the cities the US Postal Service accepts for ZIP code 51591. Using any city not on this list may result in mail delivery delays.
| City | Status |
|---|---|
| Red Oak | Acceptable |
Demographics
updated 05/2026
| Population | |
|---|---|
| Total population | 0 |
| Population density | 0 / sq mi |
| State FIPS | 19 |
| County FIPS | 137 |
| Geography | |
|---|---|
| Land area | 0.00 sq mi |
| Water area | 0.00 sq mi |
| Latitude | 41.0096 |
| Longitude | -95.2279 |
| Timezone | Central (CT) |
| Area code | 712 |