Amherst MA ZIP Code: 01002, 01003, 01004 in Hampshire

Three Amherst place-name ZIPs in Hampshire County

Amherst is a college town in Hampshire County in the Pioneer Valley of western Massachusetts. DialWick's table is built from GeoNames' US postal-code export (CC BY 4.0), retrieved 2026-08-03.

For the exact place string Amherst in Massachusetts, that export currently yields three rows: 01002, 01003, and 01004. Every one is tagged Hampshire County.

zip-codes.com lists the same four five-digit codes people associate with the Amherst mail area (01002, 01003, 01004, 01059), marks 01002 and 01003 as standard and 01004 and 01059 as PO Box, and places the city in Hampshire County with area code 413 [zip-codes.com: Amherst, MA, data note read 2026-10-25].

Commercial directories often fold 01004 and 01059 into Amherst marketing maps and may mark them PO Box-heavy. GeoNames still keeps North Amherst as its own primary place. This page follows the extract, not the realtor grouping.

UMass Amherst and other campuses drive much of the institutional mail volume attached to these codes in public tables. Prefer the ZIP on the recipient's mail over a neighborhood nickname.

North Amherst 01059 is a separate place-name row

GeoNames also carries 01059 under the primary place name North Amherst, still in Hampshire County. That is why this page does not fold 01059 into the Amherst place-name table the way some commercial city pages do.

Directories that list 01059 under an Amherst heading are usually reflecting PO Box or local mailing practice, not a second GeoNames place string of "Amherst." If your mailpiece already says North Amherst, use 01059 as printed.

Alias place names such as Cushman, Pelham, or South Amherst sometimes appear on commercial pages for 01002. Those aliases describe related place strings for the same five-digit code; they do not move the ZIP into another county in this dataset.

01002 is what most street-address forms expect for central Amherst. 01003 shows up in campus and institutional contexts. 01004 appears in commercial tables as a tighter or box-oriented assignment; confirm delivery type on USPS before treating it as ordinary street delivery.

If a form auto-completes Amherst for a North Amherst street on 01059, check the five digits the resident actually uses. That mix-up is common in the Pioneer Valley.

Hampshire County is consistent across the Amherst and North Amherst rows in the extract. That does not force every parcel inside the town polygon onto one code; it only means these place-name rows do not jump into Hampden or Franklin here.

When databases disagree on whether 01004 is street or box-only, USPS lookup for the exact street beats any static table.

Area code 413 and how to pick a ZIP

DialWick's area-code dataset places 413 in western Massachusetts (established 1947 in the public NANP list, retrieved 2026-08-03). ZIP boundaries and telephone NPAs are managed separately, so matching an Amherst ZIP does not by itself prove which exchange you dial.

For street delivery, start with the five digits on the address. 01002 covers a large share of town and nearby aliases in commercial directories; 01003 is the other standard street code commonly listed for Amherst; 01004 is a PO Box assignment under the Amherst place name.

For the ZIP-versus-area-code distinction, see ZIP code vs area code. For another single-county GeoNames city table, see Boynton Beach ZIP codes.

Overlay and split history for 413 lives on DialWick's area-code pages. It is not a postal boundary.

Sister Pioneer Valley ZIP guides use the same GeoNames pull. For ZIP versus foreign postal codes, see postal code vs ZIP code.

Town-boundary questions belong on municipal GIS or assessor maps. ZIP polygons and town lines come from different agencies and need not match.