Kelso Washington ZIP Codes
Kelso holds a single ZIP code.
Every ZIP code in Kelso
| ZIP code | County |
|---|---|
| 98626 | Cowlitz 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We do not publish a delivery type (standard, PO box, unique) or a neighbourhood for each ZIP.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 Kelso codes above are listed without a column we would have to invent.
Scope every ZIP code recorded for Kelso. 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 Kelso ZIP code begins 986. Those first three digits identify the sectional center facility that processes mail for this part of Washington. Statewide that range covers 62 ZIP codes, so Kelso accounts for 2% of it.
Every Washington ZIP prefix and the region it covers →
Area codes covering Kelso
ZIP codes and area codes are separate systems — one routes mail, the other routes calls — and they do not share boundaries. The codes below serve the same ground Kelso occupies.
Kelso Washington area codes in full →
Where Kelso's ZIP codes sit
- Reference points and footprint
- Not an official NANPA boundary
- Not a USPS delivery area
Cities near Kelso
| City | Distance | ZIP codes |
|---|---|---|
| Longview Washington ZIP codes | 4.2 mi | 1 ZIP code |
| Kalama Washington ZIP codes | 7.2 mi | 1 ZIP code |
| Castle Rock Washington ZIP codes | 11 mi | 1 ZIP code |
| Woodland Washington ZIP codes | 15 mi | 1 ZIP code |
| Vader Washington ZIP codes | 20 mi | 1 ZIP code |
| La Center Washington ZIP codes | 20 mi | 1 ZIP code |
| Toledo Washington ZIP codes | 23 mi | 1 ZIP code |
| Ridgefield Washington ZIP codes | 23 mi | 1 ZIP code |
Straight-line distance between place reference points, not driving distance.