ZIP Code 01860

01860 is one of Massachusetts's ZIP codes, delivering to addresses in Merrimac, Essex County.

City: Merrimac
County: Essex County
State: Massachusetts
Prefix: 018xx

Where this code sits

01860 is part of the 018xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Merrimac.

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 01860 delivers to without sharing its boundary.

ZIP codes nearest 01860

The ZIP codes whose reference points sit closest to 01860.
ZIP code	Distance	Delivers to
ZIP code 03859	2.6 mi	Newton Junction, NH
ZIP code 03858	3.0 mi	Newton, NH
ZIP code 01985	3.1 mi	West Newbury, MA
ZIP code 01913	3.7 mi	Amesbury, MA
ZIP code 03865	4.5 mi	Plaistow, NH
ZIP code 01830	4.8 mi	Haverhill, MA
ZIP code 03827	5.1 mi	East Kingston, NH
ZIP code 01834	5.8 mi	Groveland, 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 01860, plotted from its record coordinates.

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

Scope ZIP code 01860. 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.