Sumpter Oregon ZIP Codes

Sumpter holds a single ZIP code.

Every ZIP code in Sumpter

The complete list of Sumpter, Oregon ZIP codes with the county each falls in.
ZIP code	County
97877	Baker 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We do not publish a delivery type (standard, PO box, unique) or a neighbourhood for each ZIP.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 Sumpter codes above are listed without a column we would have to invent.

Scope every ZIP code recorded for Sumpter. Source GeoNames US postal codes (2026-07 postal dump) and Census 2024 county Gazetteer (2024 Gazetteer). Updated 15 July 2026. ZIP codes are delivery-route groupings, not areas; the boundaries implied by any ZIP map are approximations.

How these codes cluster

Every Sumpter 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 Sumpter accounts for 2% of it.

Every Oregon ZIP prefix and the region it covers →

Area codes covering Sumpter

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 Sumpter occupies.

Sumpter Oregon area codes in full →

Where Sumpter's ZIP codes sit

Each point is one Sumpter ZIP code, plotted from its record coordinates.

Reference points and footprint
Not an official NANPA boundary
Not a USPS delivery area

Cities near Sumpter

The closest places to Sumpter with their own ZIP code list, nearest first.
City	Distance	ZIP codes
Haines Oregon ZIP codes	17 mi	1 ZIP code
Baker City Oregon ZIP codes	18 mi	1 ZIP code
Unity Oregon ZIP codes	20 mi	1 ZIP code
North Powder Oregon ZIP codes	24 mi	1 ZIP code
Prairie City Oregon ZIP codes	32 mi	1 ZIP code
Union Oregon ZIP codes	36 mi	1 ZIP code
La Grande Oregon ZIP codes	41 mi	1 ZIP code
Cove Oregon ZIP codes	43 mi	1 ZIP code

Straight-line distance between place reference points, not driving distance.