ZIP Code 48721

48721 is one of Michigan's ZIP codes, delivering to addresses in Black River, Alcona County.

City: Black River
County: Alcona County
State: Michigan
Prefix: 487xx

Where this code sits

48721 is part of the 487xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Black River.

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 48721 delivers to without sharing its boundary.

989 Area code 989

ZIP codes nearest 48721

The ZIP codes whose reference points sit closest to 48721.
ZIP code	Distance	Delivers to
ZIP code 48742	7.6 mi	Lincoln, MI
ZIP code 48762	8.0 mi	Spruce, MI
ZIP code 49766	8.8 mi	Ossineke, MI
ZIP code 48740	11 mi	Harrisville, MI
ZIP code 49747	14 mi	Hubbard Lake, MI
ZIP code 48705	15 mi	Barton City, MI
ZIP code 48745	17 mi	Mikado, MI
ZIP code 48738	18 mi	Greenbush, 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 48721, plotted from its record coordinates.

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

Scope ZIP code 48721. 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.