Red Oak Iowa ZIP Codes
Red Oak holds 2 ZIP codes, all inside one county and one postal prefix.
Every ZIP code in Red Oak
| ZIP code | County |
|---|---|
| 51566 | Montgomery County |
| 51591 | Montgomery County |
We do not publish a delivery type (standard, PO box, unique) or a neighbourhood for each ZIP. USPS delivery-type products are licensed, and no clean-rights source maps ZIP codes to neighbourhoods — so the Red Oak codes above are listed without a column we would have to invent.
Scope every ZIP code recorded for Red Oak. Source GeoNames US postal codes (2026-07 postal dump) and Census 2024 county Gazetteer (2024 Gazetteer). Updated . ZIP codes are delivery-route groupings, not areas; the boundaries implied by any ZIP map are approximations.
How these codes cluster
Every Red Oak ZIP code begins 515. Those first three digits identify the sectional center facility that processes mail for this part of Iowa. Statewide that range covers 57 ZIP codes, so Red Oak accounts for 4% of it.
Every Iowa ZIP prefix and the region it covers →
Area codes covering Red Oak
ZIP codes and area codes are separate systems — one routes mail, the other routes calls — and they do not share boundaries. The code below serves the same ground Red Oak occupies.
Red Oak Iowa area codes in full →
Where Red Oak's ZIP codes sit
- Reference points and footprint
- Not an official NANPA boundary
- Not a USPS delivery area
Cities near Red Oak
| City | Distance | ZIP codes |
|---|---|---|
| Stanton Iowa ZIP codes | 6.7 mi | 1 ZIP code |
| Emerson Iowa ZIP codes | 9.3 mi | 1 ZIP code |
| Elliott Iowa ZIP codes | 9.9 mi | 1 ZIP code |
| Essex Iowa ZIP codes | 13 mi | 1 ZIP code |
| Henderson Iowa ZIP codes | 14 mi | 1 ZIP code |
| Villisca Iowa ZIP codes | 14 mi | 1 ZIP code |
| Hastings Iowa ZIP codes | 14 mi | 1 ZIP code |
| Imogene Iowa ZIP codes | 14 mi | 1 ZIP code |
Straight-line distance between place reference points, not driving distance.