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/OLDEST

ZIP Codes With the Oldest Population in Maine

What this measures. Median age of residents, ACS 5-year estimate. Source: Census American Community Survey, data release 2026-10-12.

# ZIP City County Median age
1 04341 Coopers Mills Lincoln 85.2
2 04964 Oquossoc Oxford 80.8
3 04635 Frenchboro Hancock 73.5
4 04109 Portland Cumberland 71.5
5 04645 Isle Au Haut Knox 71.4
6 04571 Trevett Lincoln 71.1
7 04624 Corea Hancock 70.9
8 04063 Ocean Park York 70.7
9 04006 Biddeford Pool York 70.3
10 04478 Rockwood Somerset 69.6
11 04855 Port Clyde Knox 69.3
12 04554 New Harbor Lincoln 69.1
13 04413 Brookton Washington 68.6
14 04541 Chamberlain Lincoln 68.4
15 04925 Caratunk Somerset 67.8
16 04576 Southport Lincoln 66.6
17 04261 Newry Oxford 66.4
18 04768 Portage Aroostook 66.2
19 04673 Sargentville Hancock 66.1
20 04936 Eustis Franklin 65.8
21 04851 Matinicus Knox 65.2
22 04613 Birch Harbor Hancock 65.1
23 04863 Vinalhaven Knox 65.1
24 04693 Winter Harbor Hancock 64.6
25 04538 Boothbay Harbor Lincoln 64.4
26 04451 Kingman Aroostook 64.3
27 04490 Topsfield Washington 64.3
28 04285 Weld Franklin 64.0
29 04675 Seal Harbor Hancock 63.8
30 04779 Sinclair Aroostook 63.8
31 04970 Rangeley Franklin 63.8
32 04056 Newfield York 63.2
33 04079 Harpswell Cumberland 63.1
34 03907 Ogunquit York 62.8
35 04110 Cumberland Foreside Cumberland 62.5
36 04642 Harborside Hancock 62.5
37 04108 Peaks Island Cumberland 61.7
38 04558 Pemaquid Lincoln 61.4
39 04631 Eastport Washington 61.4
40 04441 Greenville Piscataquis 61.3
41 04066 Orrs Island Cumberland 61.1
42 04774 Saint Francis Aroostook 60.7
43 04231 Stoneham Oxford 60.6
44 04017 Chebeague Island Cumberland 60.4
45 04746 Grand Isle Aroostook 60.3
46 04575 West Boothbay Harbor Lincoln 60.2
47 04275 Roxbury Oxford 59.6
48 04657 Meddybemps Washington 59.6
49 04024 East Baldwin Cumberland 59.5
50 04652 Lubec Washington 59.4

Showing the top 50 of 413 ZIP codes in Maine that have this figure . 04341 ranks 1st at 85.2, against 59.4 in 50th place.

Other rankings for Maine

Cite this page

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

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