Mount Vernon Oregon ZIP Codes
Mount Vernon holds a single ZIP code.
Every ZIP code in Mount Vernon
| ZIP code | County |
|---|---|
| 97865 | Grant 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We do not publish a delivery type (standard, PO box, unique) or a neighbourhood for each ZIP.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 Mount Vernon codes above are listed without a column we would have to invent.
Scope every ZIP code recorded for Mount Vernon. 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 Mount Vernon ZIP code begins 978. Those first three digits identify the sectional center facility that processes mail for this part of Oregon. Statewide that range covers 54 ZIP codes, so Mount Vernon accounts for 2% of it.
Every Oregon ZIP prefix and the region it covers →
Area codes covering Mount Vernon
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 Mount Vernon occupies.
Mount Vernon Oregon area codes in full →
Where Mount Vernon's ZIP codes sit
- Reference points and footprint
- Not an official NANPA boundary
- Not a USPS delivery area
Cities near Mount Vernon
| City | Distance | ZIP codes |
|---|---|---|
| John Day Oregon ZIP codes | 7.7 mi | 1 ZIP code |
| Canyon City Oregon ZIP codes | 8.2 mi | 1 ZIP code |
| Prairie City Oregon ZIP codes | 20 mi | 1 ZIP code |
| Long Creek Oregon ZIP codes | 21 mi | 1 ZIP code |
| Seneca Oregon ZIP codes | 21 mi | 1 ZIP code |
| Dayville Oregon ZIP codes | 21 mi | 1 ZIP code |
| Monument Oregon ZIP codes | 32 mi | 1 ZIP code |
| Spray Oregon ZIP codes | 44 mi | 1 ZIP code |
Straight-line distance between place reference points, not driving distance.