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/SMALLEST-AREA

Smallest ZIP Codes in New Hampshire by Land Area

What this measures. Land area of the Census tabulation area, smallest first. These are almost always dense urban ZIP codes covering a few city blocks. Source: Census Gazetteer, data release 2026-10-12.

# ZIP City County Land area
1 03604 Drewsville Cheshire 0.05 sq mi
2 03291 West Nottingham Rockingham 0.22 sq mi
3 03231 East Andover Merrimack 0.29 sq mi
4 03233 Elkins Merrimack 0.44 sq mi
5 03871 Rye Beach Rockingham 0.56 sq mi
6 03101 Manchester Hillsborough 0.77 sq mi
7 03854 New Castle Rockingham 0.81 sq mi
8 03847 Kearsarge Carroll 0.82 sq mi
9 03609 North Walpole Cheshire 0.90 sq mi
10 03238 Glencliff Grafton 1.00 sq mi
11 03293 Woodstock Grafton 1.45 sq mi
12 03890 West Ossipee Carroll 1.64 sq mi
13 03751 Georges Mills Sullivan 2.00 sq mi
14 03897 Wonalancet Carroll 2.36 sq mi
15 03850 Melvin Village Carroll 2.88 sq mi
16 03826 East Hampstead Rockingham 3.43 sq mi
17 03064 Nashua Hillsborough 4.14 sq mi
18 03441 Ashuelot Cheshire 4.32 sq mi
19 03770 Meriden Sullivan 4.40 sq mi
20 03765 Haverhill Grafton 4.60 sq mi
21 03273 South Sutton Merrimack 4.62 sq mi
22 03060 Nashua Hillsborough 6.56 sq mi
23 03869 Rollinsford Strafford 6.69 sq mi
24 03852 Milton Mills Strafford 6.74 sq mi
25 03856 Newfields Rockingham 7.09 sq mi
26 03109 Manchester Hillsborough 7.25 sq mi
27 03839 Rochester Strafford 7.87 sq mi
28 03817 Chocorua Carroll 8.05 sq mi
29 03063 Nashua Hillsborough 8.11 sq mi
30 03784 West Lebanon Grafton 8.33 sq mi
31 03104 Manchester Hillsborough 8.34 sq mi
32 03853 Mirror Lake Carroll 8.63 sq mi
33 03868 Rochester Strafford 8.75 sq mi
34 03874 Seabrook Rockingham 8.95 sq mi
35 03102 Manchester Hillsborough 9.06 sq mi
36 03103 Manchester Hillsborough 9.19 sq mi
37 03830 East Wakefield Carroll 9.46 sq mi
38 03858 Newton Rockingham 9.81 sq mi
39 03878 Somersworth Strafford 9.82 sq mi
40 03841 Hampstead Rockingham 10.39 sq mi
41 03840 Greenland Rockingham 10.48 sq mi
42 03865 Plaistow Rockingham 10.59 sq mi
43 03443 Chesterfield Cheshire 10.74 sq mi
44 03819 Danville Rockingham 10.99 sq mi
45 03811 Atkinson Rockingham 11.12 sq mi
46 03217 Ashland Grafton 11.23 sq mi
47 03442 Bennington Hillsborough 11.40 sq mi
48 03823 Madbury Strafford 11.65 sq mi
49 03845 Intervale Carroll 11.78 sq mi
50 03062 Nashua Hillsborough 12.03 sq mi

Showing the top 50 of 247 ZIP codes in New Hampshire that have this figure and meet the threshold above. 03604 ranks 1st at 0.05 sq mi, against 12.03 sq mi in 50th place.

Other rankings for New Hampshire

Cite this page

zipcodes.pro. “Smallest ZIP Codes in New Hampshire by Land Area.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/rankings/nh/smallest-area

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