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/NH/OLDEST

ZIP Codes With the Oldest Population in New Hampshire

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 03751 Georges Mills Sullivan 77.0
2 03233 Elkins Merrimack 72.3
3 03847 Kearsarge Carroll 70.5
4 03853 Mirror Lake Carroll 67.5
5 03259 North Sandwich Carroll 66.0
6 03443 Chesterfield Cheshire 64.8
7 03231 East Andover Merrimack 64.5
8 03227 Center Sandwich Carroll 63.3
9 03579 Errol Oxford 62.9
10 03575 Bretton Woods Coos 62.8
11 03854 New Castle Rockingham 62.8
12 03595 Twin Mountain Coos 62.3
13 03886 Tamworth Carroll 61.8
14 03592 Pittsburg Coos 61.7
15 03215 Waterville Valley Grafton 61.6
16 03273 South Sutton Merrimack 60.9
17 03238 Glencliff Grafton 60.8
18 03586 Sugar Hill Grafton 60.8
19 03836 Freedom Carroll 60.6
20 03846 Jackson Carroll 60.5
21 03860 North Conway Carroll 59.8
22 03832 Eaton Center Carroll 59.6
23 03226 Center Harbor Belknap 59.5
24 03450 Harrisville Cheshire 58.9
25 03748 Enfield Grafton 58.4
26 03850 Melvin Village Carroll 58.4
27 03254 Moultonborough Carroll 58.3
28 03583 Jefferson Coos 58.0
29 03838 Glen Carroll 57.7
30 03812 Bartlett Carroll 57.4
31 03811 Atkinson Rockingham 57.1
32 03810 Alton Bay Belknap 57.0
33 03894 Wolfeboro Carroll 56.9
34 03580 Franconia Grafton 56.3
35 03774 North Haverhill Grafton 56.2
36 03782 Sunapee Sullivan 56.2
37 03241 Hebron Grafton 56.1
38 03576 Colebrook Coos 55.9
39 03813 Center Conway Carroll 55.9
40 03842 Hampton Rockingham 55.9
41 03253 Meredith Belknap 55.7
42 03848 Kingston Rockingham 55.5
43 03467 Westmoreland Cheshire 55.3
44 03280 Washington Sullivan 55.2
45 03837 Gilmanton Iron Works Belknap 55.1
46 03602 Alstead Cheshire 54.9
47 03870 Rye Rockingham 54.9
48 03593 Randolph Coos 54.7
49 03875 Silver Lake Carroll 54.5
50 03871 Rye Beach Rockingham 54.4

Showing the top 50 of 244 ZIP codes in New Hampshire that have this figure . 03751 ranks 1st at 77.0, against 54.4 in 50th place.

Other rankings for New Hampshire

Cite this page

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

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