ZIP Code 99788

99788 is one of Alaska's ZIP codes, delivering to addresses in Chalkyitsik, Yukon-Koyukuk Census Area.

City: Chalkyitsik
Borough or census area: Yukon-Koyukuk Census Area
State: Alaska
Prefix: 997xx

Where this code sits

99788 is part of the 997xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Chalkyitsik.

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 99788 delivers to without sharing its boundary.

907 Area code 907

ZIP codes nearest 99788

The ZIP codes whose reference points sit closest to 99788.
ZIP code	Distance	Delivers to
ZIP code 99740	43 mi	Fort Yukon, AK
ZIP code 99733	58 mi	Circle, AK
ZIP code 99781	77 mi	Venetie, AK
ZIP code 99730	87 mi	Central, AK
ZIP code 99722	113 mi	Arctic Village, AK
ZIP code 99738	148 mi	Eagle, AK
ZIP code 99732	186 mi	Chicken, AK
ZIP code 99737	190 mi	Delta Junction, 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 99788, plotted from its record coordinates.

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

Scope ZIP code 99788. 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.