ZIP Code 01504

01504 is one of Massachusetts's ZIP codes, delivering to addresses in Blackstone, Worcester County.

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

Where this code sits

01504 is part of the 015xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Blackstone.

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 01504 delivers to without sharing its boundary.

ZIP codes nearest 01504

The ZIP codes whose reference points sit closest to 01504.
ZIP code	Distance	Delivers to
ZIP code 02824	2.7 mi	Forestdale, RI
ZIP code 01529	2.7 mi	Millville, MA
ZIP code 02895	3.1 mi	Woonsocket, RI
ZIP code 02876	3.3 mi	Slatersville, RI
ZIP code 02896	4.1 mi	North Smithfield, RI
ZIP code 02019	4.1 mi	Bellingham, MA
ZIP code 01756	4.8 mi	Mendon, MA
ZIP code 02838	4.9 mi	Manville, RI

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 01504, plotted from its record coordinates.

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

Scope ZIP code 01504. 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.