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/ME/YOUNGEST

ZIP Codes With the Youngest Population in Maine

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 04733 Benedicta Aroostook 15.5
2 04469 Orono Penobscot 19.6
3 04057 North Bridgton Cumberland 20.3
4 04421 Castine Hancock 21.2
5 04944 Hinckley Somerset 24.4
6 04473 Orono Penobscot 26.0
7 04764 Oxbow Aroostook 26.4
8 04988 Unity Waldo 27.8
9 04986 Thorndike Waldo 33.0
10 04780 Smyrna Mills Aroostook 33.2
11 04573 Walpole Lincoln 33.4
12 04677 Sorrento Hancock 33.8
13 04984 Temple Franklin 34.0
14 04061 North Waterboro York 35.3
15 04776 Sherman Aroostook 35.4
16 04005 Biddeford York 35.8
17 04101 Portland Cumberland 35.8
18 04348 Jefferson Lincoln 36.5
19 04227 East Dixfield Oxford 36.6
20 04254 Livermore Falls Androscoggin 36.7
21 04357 Richmond Sagadahoc 36.9
22 04965 Palmyra Somerset 37.1
23 04240 Lewiston Androscoggin 37.3
24 04092 Westbrook Cumberland 37.4
25 04686 Wesley Washington 37.4
26 04250 Lisbon Androscoggin 37.6
27 04103 Portland Cumberland 38.1
28 04084 Standish Cumberland 38.2
29 04263 Leeds Androscoggin 38.2
30 04653 Bass Harbor Hancock 38.2
31 04102 Portland Cumberland 38.3
32 04468 Old Town Penobscot 38.3
33 04648 Jonesboro Washington 38.3
34 04674 Seal Cove Hancock 38.3
35 04938 Farmington Franklin 38.3
36 04426 Dover Foxcroft Piscataquis 38.7
37 04923 Cambridge Somerset 38.7
38 04668 Princeton Washington 38.9
39 04020 Cornish York 39.0
40 04021 Cumberland Center Cumberland 39.1
41 04901 Waterville Kennebec 39.2
42 04650 Little Deer Isle Hancock 39.3
43 03908 South Berwick York 39.4
44 04038 Gorham Cumberland 39.4
45 04239 Jay Franklin 39.5
46 04969 Plymouth Penobscot 39.5
47 04027 Lebanon York 39.6
48 04220 Buckfield Oxford 39.6
49 04236 Greene Androscoggin 39.7
50 04456 Levant Penobscot 39.7

Showing the top 50 of 413 ZIP codes in Maine that have this figure . 04733 ranks 1st at 15.5, against 39.7 in 50th place.

Other rankings for Maine

Cite this page

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

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