Richland Washington ZIP Codes
Richland holds 2 ZIP codes, all inside one county and one postal prefix.
Every ZIP code in Richland
| ZIP code | County |
|---|---|
| 99352 | Benton County |
| 99354 | Benton 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We do not publish a delivery type (standard, PO box, unique) or a neighbourhood for each ZIP.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 Richland codes above are listed without a column we would have to invent.
Scope every ZIP code recorded for Richland. 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 Richland ZIP code begins 993. Those first three digits identify the sectional center facility that processes mail for this part of Washington. Statewide that range covers 36 ZIP codes, so Richland accounts for 6% of it.
Every Washington ZIP prefix and the region it covers →
Area codes covering Richland
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 Richland occupies.
Richland Washington area codes in full →
Where Richland's ZIP codes sit
- Reference points and footprint
- Not an official NANPA boundary
- Not a USPS delivery area
Cities near Richland
| City | Distance | ZIP codes |
|---|---|---|
| West Richland Washington ZIP codes | 4.8 mi | 1 ZIP code |
| Kennewick Washington ZIP codes | 8.4 mi | 3 ZIP codes |
| Pasco Washington ZIP codes | 8.4 mi | 2 ZIP codes |
| Benton City Washington ZIP codes | 9.0 mi | 1 ZIP code |
| Prosser Washington ZIP codes | 23 mi | 1 ZIP code |
| Mesa Washington ZIP codes | 24 mi | 1 ZIP code |
| Grandview Washington ZIP codes | 30 mi | 1 ZIP code |
| Connell Washington ZIP codes | 34 mi | 1 ZIP code |
Straight-line distance between place reference points, not driving distance.