ZIP Code 99688

99688 is one of Alaska's ZIP codes, delivering to addresses in Willow, Matanuska-Susitna Borough.

City: Willow
Borough or census area: Matanuska-Susitna Borough
State: Alaska
Prefix: 996xx

Where this code sits

99688 is part of the 996xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Willow.

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 99688 delivers to without sharing its boundary.

907 Area code 907

ZIP codes nearest 99688

The ZIP codes whose reference points sit closest to 99688.
ZIP code	Distance	Delivers to
ZIP code 99694	19 mi	Houston, AK
ZIP code 99676	25 mi	Talkeetna, AK
ZIP code 99652	26 mi	Big Lake, AK
ZIP code 99623	28 mi	Wasilla, AK
ZIP code 99683	30 mi	Trapper Creek, AK
ZIP code 99577	44 mi	Eagle River, AK
ZIP code 99509	47 mi	Anchorage, AK
ZIP code 99514	47 mi	Anchorage, 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 99688, plotted from its record coordinates.

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

Scope ZIP code 99688. 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.