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-AREA

Largest ZIP Codes in Massachusetts by Land Area

What this measures. Land area of the Census tabulation area, in square miles. Water is excluded. Source: Census Gazetteer, data release 2026-10-12.

# ZIP City County Land area
1 01230 Great Barrington Berkshire 96.98 sq mi
2 02360 Plymouth Plymouth 96.38 sq mi
3 01223 Becket Berkshire 69.54 sq mi
4 02346 Middleboro Plymouth 69.04 sq mi
5 01034 Granville Hampden 67.75 sq mi
6 01008 Blandford Hampden 61.19 sq mi
7 01201 Pittsfield Berkshire 60.37 sq mi
8 01085 Westfield Hampden 59.73 sq mi
9 01267 Williamstown Berkshire 59.31 sq mi
10 01339 Charlemont Franklin 58.36 sq mi
11 01007 Belchertown Hampshire 54.87 sq mi
12 01331 Athol Worcester 54.16 sq mi
13 02790 Westport Bristol 53.89 sq mi
14 01002 Amherst Hampshire 53.26 sq mi
15 01340 Colrain Franklin 52.03 sq mi
16 01255 Sandisfield Berkshire 50.52 sq mi
17 01237 Lanesborough Berkshire 49.31 sq mi
18 01370 Shelburne Falls Franklin 48.19 sq mi
19 01355 New Salem Franklin 47.50 sq mi
20 01082 Ware Hampshire 47.01 sq mi
21 02769 Rehoboth Bristol 46.94 sq mi
22 01235 Hinsdale Berkshire 46.66 sq mi
23 01247 North Adams Berkshire 45.92 sq mi
24 01057 Monson Hampden 44.54 sq mi
25 01368 Royalston Worcester 44.32 sq mi
26 01005 Barre Worcester 43.19 sq mi
27 01475 Winchendon Worcester 42.77 sq mi
28 01507 Charlton Worcester 42.18 sq mi
29 01050 Huntington Hampshire 41.37 sq mi
30 01452 Hubbardston Worcester 41.06 sq mi
31 02747 North Dartmouth Bristol 41.01 sq mi
32 01027 Easthampton Hampshire 40.59 sq mi
33 02554 Nantucket Nantucket 39.99 sq mi
34 01337 Bernardston Franklin 37.39 sq mi
35 01378 Warwick Franklin 37.35 sq mi
36 02330 Carver Plymouth 37.31 sq mi
37 01366 Petersham Worcester 36.94 sq mi
38 01430 Ashburnham Worcester 36.74 sq mi
39 01516 Douglas Worcester 36.65 sq mi
40 01364 Orange Franklin 36.00 sq mi
41 01096 Williamsburg Hampshire 35.88 sq mi
42 01256 Savoy Berkshire 35.85 sq mi
43 01473 Westminster Worcester 35.44 sq mi
44 01541 Princeton Worcester 35.43 sq mi
45 01010 Brimfield Hampden 35.23 sq mi
46 01543 Rutland Worcester 35.13 sq mi
47 01330 Ashfield Franklin 34.47 sq mi
48 01360 Northfield Franklin 34.31 sq mi
49 01257 Sheffield Berkshire 33.90 sq mi
50 01341 Conway Franklin 33.56 sq mi

Showing the top 50 of 539 ZIP codes in Massachusetts that have this figure and meet the threshold above. 01230 ranks 1st at 96.98 sq mi, against 33.56 sq mi in 50th place.

Other rankings for Massachusetts

Cite this page

zipcodes.pro. “Largest ZIP Codes in Massachusetts by Land Area.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/rankings/ma/largest-area

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