Rock Valley Iowa ZIP Codes
Rock Valley holds a single ZIP code.
Every ZIP code in Rock Valley
| ZIP code | County |
|---|---|
| 51247 | Sioux 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We do not publish a delivery type (standard, PO box, unique) or a neighbourhood for each ZIP.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 Rock Valley codes above are listed without a column we would have to invent.
Scope every ZIP code recorded for Rock Valley. 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 Rock Valley ZIP code begins 512. Those first three digits identify the sectional center facility that processes mail for this part of Iowa. Statewide that range covers 20 ZIP codes, so Rock Valley accounts for 5% of it.
Every Iowa ZIP prefix and the region it covers →
Area codes covering Rock Valley
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 Rock Valley occupies.
Rock Valley Iowa area codes in full →
Where Rock Valley's ZIP codes sit
- Reference points and footprint
- Not an official NANPA boundary
- Not a USPS delivery area
Cities near Rock Valley
| City | Distance | ZIP codes |
|---|---|---|
| Doon Iowa ZIP codes | 6.0 mi | 1 ZIP code |
| Hull Iowa ZIP codes | 7.9 mi | 1 ZIP code |
| Alvord Iowa ZIP codes | 9.6 mi | 1 ZIP code |
| Inwood Iowa ZIP codes | 10 mi | 1 ZIP code |
| Sioux Center Iowa ZIP codes | 11 mi | 1 ZIP code |
| Boyden Iowa ZIP codes | 14 mi | 1 ZIP code |
| Ireton Iowa ZIP codes | 16 mi | 1 ZIP code |
| Lester Iowa ZIP codes | 17 mi | 1 ZIP code |
Straight-line distance between place reference points, not driving distance.