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/SMALLEST-AREA

Smallest ZIP Codes in Massachusetts by Land Area

What this measures. Land area of the Census tabulation area, smallest first. These are almost always dense urban ZIP codes covering a few city blocks. Source: Census Gazetteer, data release 2026-10-12.

# ZIP City County Land area
1 02203 Boston Suffolk 0.01 sq mi
2 01525 Linwood Worcester 0.01 sq mi
3 02133 Boston Suffolk 0.01 sq mi
4 01144 Springfield Hampden 0.02 sq mi
5 01561 South Lancaster Worcester 0.04 sq mi
6 02366 South Carver Plymouth 0.05 sq mi
7 02199 Boston Suffolk 0.06 sq mi
8 02205 Boston Suffolk 0.06 sq mi
9 01937 Hathorne Essex 0.07 sq mi
10 01063 Northampton Hampshire 0.09 sq mi
11 02113 Boston Suffolk 0.10 sq mi
12 02350 Monponsett Plymouth 0.11 sq mi
13 02584 Nantucket Nantucket 0.14 sq mi
14 01718 Acton Middlesex 0.14 sq mi
15 02109 Boston Suffolk 0.17 sq mi
16 02110 Boston Suffolk 0.18 sq mi
17 02163 Boston Suffolk 0.18 sq mi
18 02111 Boston Suffolk 0.20 sq mi
19 02553 Monument Beach Barnstable 0.20 sq mi
20 02457 Babson Park Norfolk 0.20 sq mi
21 01074 South Barre Worcester 0.26 sq mi
22 01901 Lynn Essex 0.27 sq mi
23 02108 Boston Suffolk 0.27 sq mi
24 02325 Bridgewater Plymouth 0.31 sq mi
25 02142 Cambridge Middlesex 0.31 sq mi
26 01438 East Templeton Worcester 0.33 sq mi
27 01347 Lake Pleasant Franklin 0.36 sq mi
28 02357 North Easton Bristol 0.39 sq mi
29 01745 Fayville Worcester 0.39 sq mi
30 02647 Hyannis Port Barnstable 0.43 sq mi
31 01103 Springfield Hampden 0.44 sq mi
32 02114 Boston Suffolk 0.44 sq mi
33 01242 Lenox Dale Berkshire 0.46 sq mi
34 01224 Berkshire Berkshire 0.47 sq mi
35 01608 Worcester Worcester 0.48 sq mi
36 02672 West Hyannisport Barnstable 0.49 sq mi
37 01840 Lawrence Essex 0.51 sq mi
38 02464 Newton Upper Falls Middlesex 0.55 sq mi
39 02047 Humarock Plymouth 0.58 sq mi
40 02141 Cambridge Middlesex 0.61 sq mi
41 02120 Roxbury Crossing Suffolk 0.62 sq mi
42 02116 Boston Suffolk 0.65 sq mi
43 01009 Bondsville Hampden 0.70 sq mi
44 02462 Newton Lower Falls Middlesex 0.70 sq mi
45 02115 Boston Suffolk 0.71 sq mi
46 01094 Wheelwright Worcester 0.72 sq mi
47 02637 Cummaquid Barnstable 0.77 sq mi
48 01003 Amherst Hampshire 0.80 sq mi
49 02561 Sagamore Barnstable 0.83 sq mi
50 01965 Prides Crossing Essex 0.88 sq mi

Showing the top 50 of 539 ZIP codes in Massachusetts that have this figure and meet the threshold above. 02203 ranks 1st at 0.01 sq mi, against 0.88 sq mi in 50th place.

Other rankings for Massachusetts

Cite this page

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

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