ZIP Code 01921

01921 is one of Massachusetts's ZIP codes, delivering to addresses in Boxford, Essex County.

City: Boxford
County: Essex County
State: Massachusetts
Prefix: 019xx

Where this code sits

01921 is part of the 019xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Boxford.

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 01921 delivers to without sharing its boundary.

ZIP codes nearest 01921

The ZIP codes whose reference points sit closest to 01921.
ZIP code	Distance	Delivers to
ZIP code 01885	3.3 mi	West Boxford, MA
ZIP code 01833	3.7 mi	Georgetown, MA
ZIP code 01983	4.1 mi	Topsfield, MA
ZIP code 01845	5.0 mi	North Andover, MA
ZIP code 01834	5.1 mi	Groveland, MA
ZIP code 01969	5.8 mi	Rowley, MA
ZIP code 01949	5.9 mi	Middleton, MA
ZIP code 01835	6.3 mi	Haverhill, MA

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 01921, plotted from its record coordinates.

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

Scope ZIP code 01921. 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.