First three digits · Massachusetts
ZIP Codes Starting with
45 ZIP codes start with 023, sorted at the Brockton, MA (SCF 023) sectional center (USPS labeling list L005, effective October 1, 2026) in Massachusetts: 28 residential ZIP codes across 3 counties and 17 PO Box or single-organization codes (Census 2020 ZCTAs and GeoNames postal codes, October 2026).
What do the digits 023 mean?
The first digit, 0, is one of ten national areas (Connecticut, Massachusetts, Maine, New Hampshire, New Jersey, Puerto Rico, Rhode Island, Vermont, U.S. Virgin Islands and Armed Forces Europe). The first three, 023, route mail to a sectional center: USPS labeling list L005 (effective October 1, 2026) sends letters for 023 to the Brockton, MA (SCF 023) facility. The last two digits pick the delivery area. By residents, the largest town names among the 023 ZIP codes are Brockton, Plymouth, Randolph, Bridgewater, Middleboro and Pembroke.
The same facility sorts 2 prefixes, 83 ZIP codes in all: 020, 023.
Where are the 023 ZIP codes?
Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries; ACS 2020-2024 5-year estimates (B19013).
All ZIP codes starting with 023
| County | ||||||
|---|---|---|---|---|---|---|
| 02301 | Brockton | Plymouth County | 68,969 | 5,541 | $74k | $449k |
| 02302 | Brockton | Plymouth County | 36,417 | 4,100 | $92k | $425k |
| 02303 | Brockton | Plymouth County | PO Box or unique | – | – | – |
| 02304 | Brockton | Plymouth County | PO Box or unique | – | – | – |
| 02305 | Brockton | Plymouth County | PO Box or unique | – | – | – |
| 02322 | Avon | Norfolk County | 4,774 | 1,113 | $131k | $510k |
| 02324 | Bridgewater | Plymouth County | 25,704 | 953 | $113k | $534k |
| 02325 | Bridgewater | Plymouth County | 2,822 | 9,252 | – | – |
| 02327 | Bryantville | Plymouth County | PO Box or unique | – | – | – |
| 02330 | Carver | Plymouth County | 11,712 | 314 | $91k | $434k |
| 02331 | Duxbury | Plymouth County | PO Box or unique | – | – | – |
| 02332 | Duxbury | Plymouth County | 16,185 | 683 | $177k | $875k |
| 02333 | East Bridgewater | Plymouth County | 14,401 | 838 | $134k | $509k |
| 02334 | Easton | Bristol County | PO Box or unique | – | – | – |
| 02337 | Elmwood | Plymouth County | PO Box or unique | – | – | – |
| 02338 | Halifax | Plymouth County | 7,748 | 485 | $119k | $482k |
| 02339 | Hanover | Plymouth County | 14,845 | 955 | $190k | $755k |
| 02340 | Hanover | Plymouth County | PO Box or unique | – | – | – |
| 02341 | Hanson | Plymouth County | 10,542 | 707 | $132k | $536k |
| 02343 | Holbrook | Norfolk County | 11,346 | 1,619 | $115k | $465k |
| 02344 | Middleboro | Plymouth County | PO Box or unique | – | – | – |
| 02345 | Manomet | Plymouth County | PO Box or unique | – | – | – |
| 02346 | Middleboro | Plymouth County | 24,505 | 355 | $97k | $469k |
| 02347 | Lakeville | Plymouth County | 11,944 | 404 | $134k | $566k |
| 02348 | Lakeville | Plymouth County | PO Box or unique | – | – | – |
| 02349 | Middleboro | Plymouth County | PO Box or unique | – | – | – |
| 02350 | Monponsett | Plymouth County | 118 | 1,035 | – | $345k |
| 02351 | Abington | Plymouth County | 17,053 | 1,711 | $125k | $540k |
| 02355 | North Carver | Plymouth County | PO Box or unique | – | – | – |
| 02356 | North Easton | Bristol County | 12,475 | 917 | $127k | $650k |
| 02357 | North Easton | Bristol County | 1,566 | 4,036 | – | – |
| 02358 | North Pembroke | Plymouth County | PO Box or unique | – | – | – |
| 02359 | Pembroke | Plymouth County | 18,382 | 844 | $146k | $587k |
| 02360 | Plymouth | Plymouth County | 63,689 | 661 | $117k | $527k |
| 02361 | Plymouth | Plymouth County | PO Box or unique | – | – | – |
| 02362 | Plymouth | Plymouth County | PO Box or unique | – | – | – |
| 02364 | Kingston | Plymouth County | 14,027 | 752 | $120k | $611k |
| 02366 | South Carver | Plymouth County | 264 | 5,867 | – | – |
| 02367 | Plympton | Plymouth County | 2,935 | 200 | $127k | $518k |
| 02368 | Randolph | Norfolk County | 34,912 | 3,744 | $110k | $497k |
| 02370 | Rockland | Plymouth County | 17,701 | 1,765 | $112k | $473k |
| 02375 | South Easton | Bristol County | 11,275 | 818 | $121k | $513k |
| 02379 | West Bridgewater | Plymouth County | 7,708 | 503 | $123k | $504k |
| 02381 | White Horse Beach | Plymouth County | PO Box or unique | – | – | – |
| 02382 | Whitman | Plymouth County | 15,295 | 2,205 | $109k | $473k |
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates; GeoNames postal codes (CC BY 4.0) for codes without a residential area.