ZIP Code 99621

99621 is one of Alaska's ZIP codes, delivering to addresses in Kwethluk, Bethel Census Area.

City: Kwethluk
Borough or census area: Bethel Census Area
State: Alaska
Prefix: 996xx

Where this code sits

99621 is part of the 996xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Kwethluk.

Kwethluk Alaska ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 99621 delivers to without sharing its boundary.

907 Area code 907

ZIP codes nearest 99621

The ZIP codes whose reference points sit closest to 99621.
ZIP code	Distance	Delivers to
ZIP code 99551	6.7 mi	Akiachak, AK
ZIP code 99552	10 mi	Akiak, AK
ZIP code 99559	11 mi	Bethel, AK
ZIP code 99634	19 mi	Napakiak, AK
ZIP code 99679	26 mi	Tuluksak, AK
ZIP code 99641	35 mi	Nunapitchuk, AK
ZIP code 99578	46 mi	Eek, AK
ZIP code 99626	60 mi	Lower Kalskag, AK

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 99621, plotted from its record coordinates.

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

Scope ZIP code 99621. 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.