ZIP Code 97640

97640 is one of Oregon's ZIP codes, delivering to addresses in Summer Lake, Lake County.

City: Summer Lake
County: Lake County
State: Oregon
Prefix: 976xx

Where this code sits

97640 is part of the 976xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Summer Lake.

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 97640 delivers to without sharing its boundary.

ZIP codes nearest 97640

The ZIP codes whose reference points sit closest to 97640.
ZIP code	Distance	Delivers to
ZIP code 97638	17 mi	Silver Lake, OR
ZIP code 97636	21 mi	Paisley, OR
ZIP code 97641	22 mi	Christmas Valley, OR
ZIP code 97735	31 mi	Fort Rock, OR
ZIP code 97622	40 mi	Bly, OR
ZIP code 97621	41 mi	Beatty, OR
ZIP code 97639	47 mi	Sprague River, OR
ZIP code 97623	56 mi	Bonanza, OR

Straight-line distance between place reference points, not driving distance. Where a place has no Census Gazetteer point, its postal centroid is used instead.

Each point is the reference point for 97640, plotted from its record coordinates.

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

Scope ZIP code 97640. Source GeoNames US postal codes (2026-07 postal dump) and Census 2024 county Gazetteer (2024 Gazetteer). Updated 15 July 2026. A ZIP code is a set of delivery routes, not an area; the point shown is a record coordinate, not a centre.