Merrimack New Hampshire ZIP Codes

Merrimack holds a single ZIP code.

Every ZIP code in Merrimack

The complete list of Merrimack, New Hampshire ZIP codes with the county each falls in.
ZIP code	County
03054	Hillsborough County

We do not publish a delivery type (standard, PO box, unique) or a neighbourhood for each ZIP. USPS delivery-type products are licensed, and no clean-rights source maps ZIP codes to neighbourhoods — so the Merrimack codes above are listed without a column we would have to invent.

Scope every ZIP code recorded for Merrimack. Source GeoNames US postal codes (2026-07 postal dump) and Census 2024 county Gazetteer (2024 Gazetteer). Updated 15 July 2026. ZIP codes are delivery-route groupings, not areas; the boundaries implied by any ZIP map are approximations.

How these codes cluster

Every Merrimack ZIP code begins 030. Those first three digits identify the sectional center facility that processes mail for this part of New Hampshire. Statewide that range covers 38 ZIP codes, so Merrimack accounts for 3% of it.

Every New Hampshire ZIP prefix and the region it covers →

Area codes covering Merrimack

ZIP codes and area codes are separate systems — one routes mail, the other routes calls — and they do not share boundaries. The code below serves the same ground Merrimack occupies.

603 Area code 603

Merrimack New Hampshire area codes in full →

Where Merrimack's ZIP codes sit

Each point is one Merrimack ZIP code, plotted from its record coordinates.

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

Cities near Merrimack

The closest places to Merrimack with their own ZIP code list, nearest first.
City	Distance	ZIP codes
Litchfield New Hampshire ZIP codes	3.4 mi	1 ZIP code
Hudson New Hampshire ZIP codes	8.2 mi	1 ZIP code
Nashua New Hampshire ZIP codes	8.2 mi	5 ZIP codes
Milford New Hampshire ZIP codes	8.7 mi	1 ZIP code
Hollis New Hampshire ZIP codes	8.8 mi	1 ZIP code
Manchester New Hampshire ZIP codes	8.9 mi	8 ZIP codes
Windham New Hampshire ZIP codes	11 mi	1 ZIP code
Wilton New Hampshire ZIP codes	11 mi	1 ZIP code

Straight-line distance between place reference points, not driving distance. Where a place has no Census Gazetteer point, its postal centroid is used instead.