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 — RANKINGS/MA/LARGEST-POPULATION

ZIP Codes With the Largest Population in Massachusetts

What this measures. Population of the Census tabulation area, ACS 5-year estimate. Source: Census American Community Survey, data release 2026-10-12.

# ZIP City County Population
1 02301 Brockton Plymouth 68,969
2 02148 Malden Middlesex 65,906
3 02360 Plymouth Plymouth 63,689
4 02169 Quincy Norfolk 62,993
5 02155 Medford Middlesex 61,730
6 02151 Revere Suffolk 60,012
7 02124 Dorchester Center Suffolk 56,216
8 01960 Peabody Essex 54,474
9 02780 Taunton Bristol 53,461
10 01844 Methuen Essex 53,420
11 01841 Lawrence Essex 52,769
12 01902 Lynn Essex 50,066
13 02149 Everett Middlesex 50,045
14 02703 Attleboro Bristol 46,713
15 02740 New Bedford Bristol 46,281
16 01201 Pittsfield Berkshire 44,848
17 01970 Salem Essex 44,738
18 01453 Leominster Worcester 43,851
19 02128 Boston Suffolk 43,345
20 02135 Brighton Suffolk 43,149
21 01915 Beverly Essex 41,994
22 01801 Woburn Middlesex 41,939
23 01420 Fitchburg Worcester 41,839
24 01752 Marlborough Middlesex 41,647
25 01085 Westfield Hampden 41,102
26 02130 Jamaica Plain Suffolk 40,055
27 02139 Cambridge Middlesex 40,033
28 02150 Chelsea Suffolk 39,908
29 01604 Worcester Worcester 39,812
30 01702 Framingham Middlesex 39,789
31 02184 Braintree Norfolk 38,899
32 01545 Shrewsbury Worcester 38,876
33 02138 Cambridge Middlesex 38,509
34 01040 Holyoke Hampden 37,813
35 02136 Hyde Park Suffolk 37,265
36 01852 Lowell Middlesex 37,144
37 01760 Natick Middlesex 36,782
38 02127 Boston Suffolk 36,769
39 02302 Brockton Plymouth 36,417
40 01810 Andover Essex 35,648
41 02472 Watertown Middlesex 35,620
42 02368 Randolph Norfolk 34,912
43 02125 Dorchester Suffolk 33,662
44 01851 Lowell Middlesex 33,403
45 02038 Franklin Norfolk 33,154
46 01826 Dracut Middlesex 32,629
47 01701 Framingham Middlesex 32,618
48 01845 North Andover Essex 32,494
49 02453 Waltham Middlesex 31,591
50 02062 Norwood Norfolk 31,542

Showing the top 50 of 539 ZIP codes in Massachusetts that have this figure . 02301 ranks 1st at 68,969, against 31,542 in 50th place.

Other rankings for Massachusetts

Cite this page

zipcodes.pro. “ZIP Codes With the Largest Population in Massachusetts.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/rankings/ma/largest-population

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