| City: | Red Oak, Iowa |
| County: | Montgomery County |
| Timezone: | Central (GMT -06:00) |
| Local Time: | 7:17:02 AM |
| Population: | No Population Data |
| Area Code: | 712 |
| Classification: | PO Box |
| Coordinates: | 41.0096, -95.2279 |
| Quick Link: |
Red Oak residents who need a PO Box use this ZIP. The post office is located in Montgomery County in southwestern Iowa. Because this ZIP only contains post office boxes, it shows zero population and no street records in postal databases.
This ZIP code contains no street delivery addresses. All mail delivery in Red Oak uses either PO Boxes (51591) or street addresses in the main ZIP code (51566).
ZIP Code 51591 is designated for PO Box delivery only; business establishment and employment data are not available.
| # Residential Mailboxes: | 0Source: USPS |
| # Business Mailboxes: | 0Source: USPS |
| Total Delivery Receptacles: | 0Source: USPS |
| Single Family Delivery Units: | 0Source: USPS |
| Multi Family Delivery Units: | 0Source: USPS |
| # of Businesses: | 0Source: CBP |
| 1st Quarter Payroll: | $0Source: CBP |
| Annual Payroll: | $0Source: CBP |
| # of Employees: | 0Source: CBP |
ZIP Code 51591 is located in Montgomery County, Iowa, within the Metropolitan Statistical Area (CBSA ). This area has a population of 0 people, about 0.00% of whom live in ZIP Code 51591. It covers 0 sq mi of land and a water area of 0 sq mi.
| CBSA Name: | --Source: Census |
| CBSA Number: | --Source: Census |
| CBSA Type: | --Source: Census |
| CBSA Division: | --Source: Census |
| CBSA Population: | 0Source: Census |
| MSA: | Source: Census |
| Land Area: | --Source: Census |
| Water Area: | --Source: Census |
| Congressional District: | No DistrictsSource: USPS |
| Congressional Land Area: | sq miSource: Census |
| PMSA: | Source: Census |
| Intro Date: | < 2004-10Source: ZIP-Codes.com |
| Place FIPS Code: | 1966135Source: Census |
| Place Name: | Red Oak city; IowaSource: Census |
We could not locate which school district 51591 belongs to, but we will update this once new district data is released. There are no public schools nor private schools with a mailing address in this ZIP Code. Listing Nearby schools instead. It also has 6 colleges, universities or post secondary education institutions nearby which would be a short commute to.
Our sources include trusted federal and licensed data from the United States Postal Service, U.S. Census Bureau, U.S. Geological Survey, Centers for Medicare & Medicaid Services, and the National Center for Education Statistics, along with proprietary datasets created by ZIP-Codes.com. Data last updated on March 1, 2026.