ZIP Code 48631

48631 is one of Michigan's ZIP codes, delivering to addresses in Kawkawlin, Bay County.

City: Kawkawlin
County: Bay County
State: Michigan
Prefix: 486xx

Where this code sits

48631 is part of the 486xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Kawkawlin.

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 48631 delivers to without sharing its boundary.

989 Area code 989

ZIP codes nearest 48631

The ZIP codes whose reference points sit closest to 48631.
ZIP code	Distance	Delivers to
ZIP code 48707	5.0 mi	Bay City, MI
ZIP code 48706	5.3 mi	Bay City, MI
ZIP code 48634	7.0 mi	Linwood, MI
ZIP code 48611	7.4 mi	Auburn, MI
ZIP code 48710	8.5 mi	University Center, MI
ZIP code 48708	8.8 mi	Bay City, MI
ZIP code 48732	9.9 mi	Essexville, MI
ZIP code 48642	11 mi	Midland, MI

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 48631, plotted from its record coordinates.

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

Scope ZIP code 48631. 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.