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/LARGEST-POPULATION

ZIP Codes With the Largest Population in New Hampshire

What this measures. Population of the Census tabulation area, ACS 5-year estimate. Source: Census American Community Survey, data release 2026-10-12.

# ZIP City County Population
1 03103 Manchester Hillsborough 37,775
2 03104 Manchester Hillsborough 35,237
3 03038 Derry Rockingham 34,474
4 03301 Concord Merrimack 33,995
5 03102 Manchester Hillsborough 33,959
6 03820 Dover Strafford 33,440
7 03060 Nashua Hillsborough 31,657
8 03079 Salem Rockingham 30,964
9 03062 Nashua Hillsborough 29,441
10 03054 Merrimack Hillsborough 28,176
11 03053 Londonderry Rockingham 26,327
12 03051 Hudson Hillsborough 25,557
13 03431 Keene Cheshire 25,065
14 03110 Bedford Hillsborough 23,746
15 03801 Portsmouth Rockingham 23,484
16 03833 Exeter Rockingham 22,817
17 03867 Rochester Strafford 22,732
18 03246 Laconia Belknap 17,103
19 03303 Concord Merrimack 16,571
20 03055 Milford Hillsborough 16,337
21 03842 Hampton Rockingham 16,324
22 03087 Windham Rockingham 16,038
23 03063 Nashua Hillsborough 15,805
24 03824 Durham Strafford 15,080
25 03106 Hooksett Merrimack 15,032
26 03076 Pelham Hillsborough 14,449
27 03064 Nashua Hillsborough 14,391
28 03045 Goffstown Hillsborough 14,080
29 03743 Claremont Sullivan 13,704
30 03275 Suncook Merrimack 12,205
31 03878 Somersworth Strafford 12,205
32 03031 Amherst Hillsborough 11,849
33 03766 Lebanon Grafton 11,195
34 03077 Raymond Rockingham 10,900
35 03755 Hanover Grafton 10,569
36 03109 Manchester Hillsborough 9,929
37 03825 Barrington Strafford 9,489
38 03857 Newmarket Rockingham 9,463
39 03570 Berlin Coos 9,383
40 03281 Weare Hillsborough 9,170
41 03276 Tilton Merrimack 9,015
42 03235 Franklin Merrimack 8,903
43 03049 Hollis Hillsborough 8,603
44 03052 Litchfield Hillsborough 8,499
45 03874 Seabrook Rockingham 8,487
46 03304 Bow Merrimack 8,335
47 03244 Hillsborough Hillsborough 8,156
48 03865 Plaistow Rockingham 7,861
49 03249 Gilford Belknap 7,830
50 03885 Stratham Rockingham 7,754

Showing the top 50 of 247 ZIP codes in New Hampshire that have this figure . 03103 ranks 1st at 37,775, against 7,754 in 50th place.

Other rankings for New Hampshire

Cite this page

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

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