Riverside Iowa ZIP Codes
Riverside holds a single ZIP code.
Every ZIP code in Riverside
| ZIP code | County |
|---|---|
| 52327 | Washington 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We do not publish a delivery type (standard, PO box, unique) or a neighbourhood for each ZIP.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 Riverside codes above are listed without a column we would have to invent.
Scope every ZIP code recorded for Riverside. 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 Riverside ZIP code begins 523. Those first three digits identify the sectional center facility that processes mail for this part of Iowa. Statewide that range covers 53 ZIP codes, so Riverside accounts for 2% of it.
Every Iowa ZIP prefix and the region it covers →
Area codes covering Riverside
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 Riverside occupies.
Riverside Iowa area codes in full →
Where Riverside's ZIP codes sit
- Reference points and footprint
- Not an official NANPA boundary
- Not a USPS delivery area
Cities near Riverside
| City | Distance | ZIP codes |
|---|---|---|
| Hills Iowa ZIP codes | 5.4 mi | 1 ZIP code |
| Kalona Iowa ZIP codes | 6.7 mi | 1 ZIP code |
| Lone Tree Iowa ZIP codes | 7.5 mi | 1 ZIP code |
| Iowa City Iowa ZIP codes | 12 mi | 6 ZIP codes |
| Ainsworth Iowa ZIP codes | 13 mi | 1 ZIP code |
| Conesville Iowa ZIP codes | 14 mi | 1 ZIP code |
| Wellman Iowa ZIP codes | 14 mi | 1 ZIP code |
| Nichols Iowa ZIP codes | 14 mi | 1 ZIP code |
Straight-line distance between place reference points, not driving distance.