First three digits · Massachusetts
ZIP Codes Starting with
36 ZIP codes start with 024, sorted at the Boston, MA (SCF 021) sectional center (USPS labeling list L005, effective October 1, 2026) in Massachusetts: 27 residential ZIP codes across 2 counties and 9 PO Box or single-organization codes (Census 2020 ZCTAs and GeoNames postal codes, October 2026).
What do the digits 024 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, 024, route mail to a sectional center: USPS labeling list L005 (effective October 1, 2026) sends letters for 024 to the Boston, MA (SCF 021) facility. The last two digits pick the delivery area. By residents, the largest town names among the 024 ZIP codes are Waltham, Brookline, Arlington, Watertown, Lexington and Belmont.
The same facility sorts 3 prefixes, 118 ZIP codes in all: 021, 022, 024.
Where are the 024 ZIP codes?
Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries; ACS 2020-2024 5-year estimates (B19013).
All ZIP codes starting with 024
| County | ||||||
|---|---|---|---|---|---|---|
| 02420 | Lexington | Middlesex County | 16,215 | 2,304 | $245k | $1.2M |
| 02421 | Lexington | Middlesex County | 18,080 | 1,889 | $228k | $1.21M |
| 02445 | Brookline | Norfolk County | 22,560 | 8,640 | $140k | $1.23M |
| 02446 | Brookline | Norfolk County | 31,310 | 24,385 | $132k | $1.18M |
| 02447 | Brookline Village | Norfolk County | PO Box or unique | – | – | – |
| 02451 | Waltham | Middlesex County | 17,393 | 3,269 | $122k | $753k |
| 02452 | Waltham | Middlesex County | 15,808 | 4,146 | $118k | $808k |
| 02453 | Waltham | Middlesex County | 31,591 | 8,795 | $115k | $705k |
| 02454 | Waltham | Middlesex County | PO Box or unique | – | – | – |
| 02455 | North Waltham | Middlesex County | PO Box or unique | – | – | – |
| 02456 | New Town | Middlesex County | PO Box or unique | – | – | – |
| 02457 | Babson Park | Norfolk County | 1,881 | 9,221 | – | – |
| 02458 | Newton | Middlesex County | 13,050 | 6,638 | $154k | $1.14M |
| 02459 | Newton Center | Middlesex County | 18,449 | 3,665 | $228k | $1.45M |
| 02460 | Newtonville | Middlesex County | 10,099 | 7,492 | $178k | $1.22M |
| 02461 | Newton Highlands | Middlesex County | 6,975 | 4,544 | $224k | $1.26M |
| 02462 | Newton Lower Falls | Middlesex County | 1,470 | 2,106 | $216k | $1.21M |
| 02464 | Newton Upper Falls | Middlesex County | 3,833 | 6,956 | $106k | $940k |
| 02465 | West Newton | Middlesex County | 11,697 | 5,438 | $194k | $1.16M |
| 02466 | Auburndale | Middlesex County | 8,679 | 5,469 | $170k | $1.17M |
| 02467 | Chestnut Hill | Norfolk County | 23,001 | 4,688 | $169k | $1.34M |
| 02468 | Waban | Middlesex County | 5,773 | 3,758 | $250k+ | $1.85M |
| 02471 | Watertown | Middlesex County | PO Box or unique | – | – | – |
| 02472 | Watertown | Middlesex County | 35,620 | 8,839 | $126k | $785k |
| 02474 | Arlington | Middlesex County | 28,642 | 9,366 | $151k | $933k |
| 02475 | Arlington Heights | Middlesex County | PO Box or unique | – | – | – |
| 02476 | Arlington | Middlesex County | 17,708 | 8,497 | $151k | $935k |
| 02477 | Watertown | Middlesex County | PO Box or unique | – | – | – |
| 02478 | Belmont | Middlesex County | 27,175 | 5,850 | $183k | $1.16M |
| 02479 | Waverley | Middlesex County | PO Box or unique | – | – | – |
| 02481 | Wellesley Hills | Norfolk County | 17,415 | 2,860 | $250k+ | $1.69M |
| 02482 | Wellesley | Norfolk County | 11,051 | 2,971 | $226k | $1.35M |
| 02492 | Needham | Norfolk County | 21,424 | 2,254 | $227k | $1.22M |
| 02493 | Weston | Middlesex County | 11,579 | 688 | $250k+ | $1.69M |
| 02494 | Needham Heights | Norfolk County | 11,035 | 3,941 | $180k | $1.11M |
| 02495 | Nonantum | Middlesex County | PO Box or unique | – | – | – |
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates; GeoNames postal codes (CC BY 4.0) for codes without a residential area.