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/YOUNGEST

ZIP Codes With the Youngest Population in Massachusetts

What this measures. Median age of residents, lowest first. Source: Census American Community Survey, data release 2026-10-12.

# ZIP City County Median age
1 01003 Amherst Hampshire 19.7
2 01063 Northampton Hampshire 19.8
3 02457 Babson Park Norfolk 19.9
4 02325 Bridgewater Plymouth 20.2
5 02357 North Easton Bristol 20.5
6 02215 Boston Suffolk 21.6
7 02115 Boston Suffolk 21.7
8 02163 Boston Suffolk 22.8
9 02120 Roxbury Crossing Suffolk 23.6
10 01731 Hanscom Afb Middlesex 25.0
11 01224 Berkshire Berkshire 25.9
12 02467 Chestnut Hill Norfolk 26.5
13 01610 Worcester Worcester 26.6
14 01002 Amherst Hampshire 27.0
15 02138 Cambridge Middlesex 28.3
16 02134 Allston Suffolk 28.5
17 01608 Worcester Worcester 28.7
18 01107 Springfield Hampden 28.8
19 01109 Springfield Hampden 29.3
20 01984 Wenham Essex 29.3
21 01609 Worcester Worcester 29.4
22 02113 Boston Suffolk 29.4
23 02139 Cambridge Middlesex 30.0
24 02542 Buzzards Bay Barnstable 30.1
25 02135 Brighton Suffolk 30.4
26 01105 Springfield Hampden 30.5
27 02142 Cambridge Middlesex 30.9
28 01380 Wendell Depot Franklin 31.2
29 02141 Cambridge Middlesex 31.2
30 02746 New Bedford Bristol 31.2
31 01009 Bondsville Hampden 31.3
32 02452 Waltham Middlesex 31.6
33 01083 Warren Worcester 31.8
34 01841 Lawrence Essex 31.8
35 02144 Somerville Middlesex 31.8
36 01605 Worcester Worcester 32.0
37 02071 South Walpole Norfolk 32.0
38 02143 Somerville Middlesex 32.1
39 02127 Boston Suffolk 32.3
40 02453 Waltham Middlesex 32.7
41 01854 Lowell Middlesex 32.8
42 01436 Baldwinville Worcester 33.0
43 01905 Lynn Essex 33.1
44 01108 Springfield Hampden 33.3
45 02114 Boston Suffolk 33.3
46 02145 Somerville Middlesex 33.3
47 01850 Lowell Middlesex 33.4
48 02109 Boston Suffolk 33.5
49 01840 Lawrence Essex 33.6
50 02133 Boston Suffolk 33.7

Showing the top 50 of 529 ZIP codes in Massachusetts that have this figure . 01003 ranks 1st at 19.7, against 33.7 in 50th place.

Other rankings for Massachusetts

Cite this page

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

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