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/03303

03303

ZIP 03303 is in Concord, New Hampshire, in Merrimack County; area code 603; Eastern time. Concord has 4 ZIP codes; the others are 03301, 03302 and 03305.

Type
Standard
Time zone
America/New_York
County
Merrimack
Metro area
Concord, NH
Population
16,571
Coordinates
43.3117, -71.6654
☼ Live from 03303 — Concord, NH

Weather right now

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Local time: —

Where 03303 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 03303
  • 🔢 Type 03303 into a pocket calculator and turn it upside down: EOEEO — not quite a word, sorry.
  • ➕ As a number, 3,303 = 3 × 3 × 367. Its digits add up to 9, a total 375 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 110011100111
  • 🏠 Its numerical neighbours: 03302 (Concord, NH, 0 mi away) and 03304 (Bow, NH, 14 mi away).
  • 🔄 Backwards, 03303 becomes 30330, which is not a ZIP code at all.
  • 👥 4 other ZIP codes are made of exactly the same digits (03033, 30033, 30303, 33030). The farthest-flung twin is 33030 in Homestead, FL, 1,329 miles away.
  • 🧭 Farther north than 84% of all ZIP codes, and farther east than 95%.
  • 🎯1,406 miles east of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 03303 and you would come out at 43.31°S, 108.33°E — 885 miles from Perth, Australia, the nearest big city to that spot.
  • ☀Longest day of the year: 15h 24m of daylight. Shortest: 8h 58m.
  • 📏 At 67.8 square miles of land, 03303 is bigger than 68% of ZIP codes — room for about 51 Central Parks.
🌙 The sky over 03303 today
  • Working out the sun…
🌋 Shake report
  • Checking the USGS…

Source: USGS.

People and housing

Population16,571This ZIP16,571
Households6,700This ZIP6,700
Housing units6,912This ZIP6,912
Median age42.7This ZIP42.7New Hampshire43.3US 38.9
Median household income$80,456This ZIP$80,456New Hampshire$99,031US $80,734
Median home value$296,200This ZIP$296,200New Hampshire$402,500US $332,700
Median gross rent$1,415This ZIP$1,415New Hampshire$1,491US $1,413
Bachelor's degree or higher30.0%This ZIP30.0%
Mean commute27.0 minThis ZIP27.0 min
Population density244.4 / sq miThis ZIP244.4 / sq mi

Business and tax activity

Business establishments198This ZIP198
Employees2,216This ZIP2,216
Annual payroll$120,696,000This ZIP$120,696,000
Tax returns filed8,280This ZIP8,280
Total adjusted gross income$624,437,000This ZIP$624,437,000

Land area

Land area67.80 sq miThis ZIP67.80 sq mi
Water area1.68 sq miThis ZIP1.68 sq mi

Other place names in 03303

Census places whose land this ZIP code overlaps. The Postal Service may accept other city names in an address, too.

ZIP codes near 03303

ZIPCityDistance
03302 Concord, NH 0.2 mi
03224 Canterbury, NH 6.5 mi
03268 Salisbury, NH 7.5 mi
03301 Concord, NH 7.5 mi
03229 Contoocook, NH 7.7 mi
03278 Warner, NH 8.6 mi
03276 Tilton, NH 9.4 mi
03235 Franklin, NH 9.5 mi
03305 Concord, NH 10.1 mi
03231 East Andover, NH 10.6 mi

Find every ZIP code within 10 miles of 03303 →

Questions about this ZIP code

Where is ZIP code 03303?

03303 is in Concord, New Hampshire, in Merrimack County, part of the Concord, NH micropolitan area. Its published point location is 43.3117, -71.6654.

What county is 03303 in?

03303 lies in Merrimack County.

What area code is 03303?

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

What time zone is 03303 in?

03303 uses America/New_York.

How many people live in 03303?

About 16,571 people live in ZIP code 03303, in 6,700 households, at 244.4 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 03303?

$80,456 a year, against $99,031 across New Hampshire.

What ZIP codes are near 03303?

The closest are 03302 (0.2 mi), 03224 (6.5 mi), 03268 (7.5 mi), 03301 (7.5 mi) and 03229 (7.7 mi).

Is 03303 a PO Box ZIP code?

03303 is a standard ZIP code. A normal ZIP code with street delivery.

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Cite this page

zipcodes.pro. “03303 ZIP Code — Concord, New Hampshire (Merrimack County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/03303

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