ZIP Code 01523

01523 is one of Massachusetts's ZIP codes, delivering to addresses in Lancaster, Worcester County.

City: Lancaster
County: Worcester County
State: Massachusetts
Prefix: 015xx

Where this code sits

01523 is part of the 015xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Lancaster.

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 01523 delivers to without sharing its boundary.

ZIP codes nearest 01523

The ZIP codes whose reference points sit closest to 01523.
ZIP code	Distance	Delivers to
ZIP code 01561	0.5 mi	South Lancaster, MA
ZIP code 01510	2.3 mi	Clinton, MA
ZIP code 01740	4.2 mi	Bolton, MA
ZIP code 01467	4.5 mi	Still River, MA
ZIP code 01564	4.6 mi	Sterling, MA
ZIP code 01503	5.3 mi	Berlin, MA
ZIP code 01453	6.4 mi	Leominster, MA
ZIP code 01451	6.6 mi	Harvard, 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 01523, plotted from its record coordinates.

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

Scope ZIP code 01523. 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.