ZIP Code 02121

02121 is one of Massachusetts's ZIP codes, delivering to addresses in Dorchester, Suffolk County.

City: Dorchester
County: Suffolk County
State: Massachusetts
Prefix: 021xx

Where this code sits

02121 is part of the 021xx range, the group of codes handled by one mail processing centre. Dorchester is served by 3 ZIP codes in total.

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 02121 delivers to without sharing its boundary.

ZIP codes nearest 02121

The ZIP codes whose reference points sit closest to 02121.
ZIP code	Distance	Delivers to
ZIP code 02122	0.0 mi	Dorchester, MA
ZIP code 02125	0.0 mi	Dorchester, MA
ZIP code 02124	0.4 mi	Dorchester Center, MA
ZIP code 02126	1.9 mi	Mattapan, MA
ZIP code 02187	2.1 mi	Milton Village, MA
ZIP code 02130	2.2 mi	Jamaica Plain, MA
ZIP code 02119	2.2 mi	Roxbury, MA
ZIP code 02120	2.5 mi	Roxbury Crossing, 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 02121, plotted from its record coordinates.

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

Scope ZIP code 02121. 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.