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 — ZIP/03225

03225

ZIP 03225 is Center Barnstead, New Hampshire, in Belknap County; area code 603; Eastern time.

Type
Standard
Time zone
America/New_York
County
Belknap
Metro area
Laconia, NH
Population
3,834
Coordinates
43.3638, -71.2417
☼ Live from 03225 — Center Barnstead, NH

Weather right now

Asking the National Weather Service…

NEXRAD radar
Finding the nearest radar…
Local time: —

Where 03225 is

Approximate ZIP boundary (Census ZCTA 2020). ZIP codes are mail routes, not areas, so the shape shown is the Census tabulation area that approximates it.

★ Weird and wonderful facts about 03225
  • 🔢 Type 03225 into a pocket calculator and turn it upside down: SZZEO — not quite a word, sorry.
  • ➕ As a number, 3,225 = 3 × 5 × 5 × 43. Its digits add up to 12, a total 940 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 110010011001
  • 🏠 Its numerical neighbours: 03224 (Canterbury, NH, 15 mi away) and 03226 (Center Harbor, NH, 27 mi away).
  • 🔄 Backwards, 03225 becomes 52230, which is not a ZIP code at all.
  • 👥 37 other ZIP codes are made of exactly the same digits (02325, 02532, 03252, 20235, 20523, 22035, …). The farthest-flung twin is 32502 in Pensacola, FL, 1,253 miles away.
  • 🧭 Farther north than 85% of all ZIP codes, and farther east than 96%.
  • 🎯1,427 miles east of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 03225 and you would come out at 43.36°S, 108.76°E — 878 miles from Perth, Australia, the nearest big city to that spot.
  • ☀Longest day of the year: 15h 24m of daylight. Shortest: 8h 58m.
  • 📏 At 27.8 square miles of land, 03225 is bigger than 44% of ZIP codes — room for about 21 Central Parks.
🌙 The sky over 03225 today
  • Working out the sun…
🌋 Shake report
  • Checking the USGS…

Source: USGS.

People and housing

Population3,834This ZIP3,834
Households1,359This ZIP1,359
Housing units1,946This ZIP1,946
Median age43.2This ZIP43.2New Hampshire43.3US 38.9
Median household income$111,660This ZIP$111,660New Hampshire$99,031US $80,734
Median home value$368,400This ZIP$368,400New Hampshire$402,500US $332,700
Median gross rent$1,355This ZIP$1,355New Hampshire$1,491US $1,413
Bachelor's degree or higher30.4%This ZIP30.4%
Mean commute30.9 minThis ZIP30.9 min
Population density138.1 / sq miThis ZIP138.1 / sq mi

Business and tax activity

Business establishments51This ZIP51
Employees209This ZIP209
Annual payroll$9,242,000This ZIP$9,242,000
Tax returns filed1,960This ZIP1,960
Total adjusted gross income$155,873,000This ZIP$155,873,000

Land area

Land area27.76 sq miThis ZIP27.76 sq mi
Water area1.68 sq miThis ZIP1.68 sq mi

ZIP codes near 03225

ZIPCityDistance
03218 Barnstead, NH 2.5 mi
03263 Pittsfield, NH 6.2 mi
03837 Gilmanton Iron Works, NH 6.2 mi
03884 Strafford, NH 7.1 mi
03809 Alton, NH 7.3 mi
03855 New Durham, NH 8.2 mi
03237 Gilmanton, NH 8.7 mi
03835 Farmington, NH 9.0 mi
03815 Center Strafford, NH 9.7 mi
03307 Loudon, NH 10.5 mi

Find every ZIP code within 10 miles of 03225 →

Questions about this ZIP code

Where is ZIP code 03225?

03225 is in Center Barnstead, New Hampshire, in Belknap County, part of the Laconia, NH micropolitan area. Its published point location is 43.3638, -71.2417.

What county is 03225 in?

03225 lies in Belknap County.

What area code is 03225?

Center Barnstead uses area code 603, from NANPA's telephone records.

What time zone is 03225 in?

03225 uses America/New_York.

How many people live in 03225?

About 3,834 people live in ZIP code 03225, in 1,359 households, at 138.1 people per square mile. These are American Community Survey 5-year estimates for the ZIP Code Tabulation Area, not a headcount.

What is the median household income in 03225?

$111,660 a year, against $99,031 across New Hampshire.

What ZIP codes are near 03225?

The closest are 03218 (2.5 mi), 03263 (6.2 mi), 03837 (6.2 mi), 03884 (7.1 mi) and 03809 (7.3 mi).

Is 03225 a PO Box ZIP code?

03225 is a standard ZIP code. A normal ZIP code with street delivery.

Download or cite

Cite this page

zipcodes.pro. “03225 ZIP Code — Center Barnstead, New Hampshire (Belknap County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/03225

Machine-readable version of these facts:

curl https://zipcodes.pro/zip/03225.json

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