ZIP Code 01521

01521 is one of Massachusetts's ZIP codes, delivering to addresses in Holland, Hampden County.

City: Holland
County: Hampden County
State: Massachusetts
Prefix: 015xx

Where this code sits

01521 is part of the 015xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Holland.

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 01521 delivers to without sharing its boundary.

ZIP codes nearest 01521

The ZIP codes whose reference points sit closest to 01521.
ZIP code	Distance	Delivers to
ZIP code 01081	3.0 mi	Wales, MA
ZIP code 01010	5.5 mi	Brimfield, MA
ZIP code 01518	6.0 mi	Fiskdale, MA
ZIP code 01566	6.2 mi	Sturbridge, MA
ZIP code 06077	6.3 mi	Staffordville, CT
ZIP code 01550	6.6 mi	Southbridge, MA
ZIP code 06075	7.9 mi	Stafford, CT
ZIP code 06076	8.6 mi	Stafford Springs, CT

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 01521, plotted from its record coordinates.

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

Scope ZIP code 01521. 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.