Every ZIP code in the United States, with weather, radar, trivia and the numbers behind it. Five digits since 1963!

ZIP stands for Zone Improvement Plan. The codes went live on July 1, 1963.The lowest ZIP code is 00501 — the IRS in Holtsville, New York.The highest ZIP code is 99950, in Ketchikan, Alaska.Type 07734 into a calculator and turn it upside down: hELLO. It is Keansburg, New Jersey.12345 belongs to one company: General Electric in Schenectady, New York.The first digit is a region: 0 is New England and New Jersey, 9 is the West Coast, Alaska and Hawaii.Mr. ZIP, the cartoon mailman, was the mascot that sold the idea to America.ZIP+4 arrived in 1983 and can narrow a ZIP down to one side of one block.A ZIP code is a mail route, not a place: plenty of them cross county and even state lines.Play ZIP Hunt: guess the secret ZIP code of the day in six tries.
zipcodes.pro — PREFIX/023

ZIP codes starting with 023

ZIP codes
45
States
MA
Largest city
Brockton, MA
Population
479,314

The first three digits of a ZIP code identify a sectional center facility — the postal processing plant that sorts mail for the area. It is a mail-routing grouping, not an administrative boundary.

Every ZIP code in 023xx

ZIP codes starting with 023
ZIP City Type Population Median income Median home
02301 Brockton , MA Standard 68,969 $74,214 $449,400
02302 Brockton , MA Standard 36,417 $92,274 $424,800
02303 Brockton , MA No street area — — —
02304 Brockton , MA No street area — — —
02305 Brockton , MA No street area — — —
02322 Avon , MA Standard 4,774 $130,625 $509,600
02324 Bridgewater , MA Standard 25,704 $112,726 $533,600
02325 Bridgewater , MA Standard 2,822 — —
02327 Bryantville , MA No street area — — —
02330 Carver , MA Standard 11,712 $91,250 $434,200
02331 Duxbury , MA No street area — — —
02332 Duxbury , MA Standard 16,185 $176,583 $874,600
02333 East Bridgewater , MA Standard 14,401 $133,741 $509,200
02334 Easton , MA No street area — — —
02337 Elmwood , MA No street area — — —
02338 Halifax , MA Standard 7,748 $118,556 $481,500
02339 Hanover , MA Standard 14,845 $189,803 $755,400
02340 Hanover , MA No street area — — —
02341 Hanson , MA Standard 10,542 $132,250 $536,100
02343 Holbrook , MA Standard 11,346 $115,032 $464,700
02344 Middleboro , MA No street area — — —
02345 Manomet , MA No street area — — —
02346 Middleboro , MA Standard 24,505 $97,056 $468,700
02347 Lakeville , MA Standard 11,944 $133,984 $565,900
02348 Lakeville , MA No street area — — —
02349 Middleboro , MA No street area — — —
02350 Monponsett , MA Standard 118 — $345,000
02351 Abington , MA Standard 17,053 $125,400 $539,600
02355 North Carver , MA No street area — — —
02356 North Easton , MA Standard 12,475 $127,224 $650,300
02357 North Easton , MA Standard 1,566 — —
02358 North Pembroke , MA No street area — — —
02359 Pembroke , MA Standard 18,382 $146,285 $586,500
02360 Plymouth , MA Standard 63,689 $116,941 $527,400
02361 Plymouth , MA No street area — — —
02362 Plymouth , MA No street area — — —
02364 Kingston , MA Standard 14,027 $119,876 $610,600
02366 South Carver , MA Standard 264 — —
02367 Plympton , MA Standard 2,935 $126,736 $517,800
02368 Randolph , MA Standard 34,912 $109,665 $496,800
02370 Rockland , MA Standard 17,701 $112,405 $472,900
02375 South Easton , MA Standard 11,275 $120,903 $513,000
02379 West Bridgewater , MA Standard 7,708 $123,406 $503,800
02381 White Horse Beach , MA No street area — — —
02382 Whitman , MA Standard 15,295 $108,933 $472,700

Cite this page

zipcodes.pro. “ZIP codes starting with 023.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/prefix/023

Underlying data is public domain or openly licensed — sources, vintages and licences.