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/06813

06813

ZIP 06813 is in Danbury, Connecticut, in Fairfield County; area codes 203 and 475; Eastern time. Danbury has 6 ZIP codes; the others are 06810, 06811, 06814, 06816 and 06817.

Type
No street area
Time zone
America/New_York
County
Fairfield
Metro area
none
Coordinates
41.3948, -73.4540

The Census map gives this ZIP code no delivery area of its own, which usually means it serves post office boxes, a single organization or a post office rather than streets of homes.

This ZIP code has no Census tabulation area of its own. Its point falls inside ZCTA 06810, whose figures describe that area — not this ZIP code.

☼ Live from 06813 — Danbury, CT

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Where 06813 is

This ZIP code has no Census tabulation area, so there is no boundary to draw — the marker is its published point location.

★ Weird and wonderful facts about 06813
  • 🔢 Type 06813 into a pocket calculator and turn it upside down: EIBgO — not quite a word, sorry.
  • ➕ As a number, 6,813 = 3 × 3 × 757. Its digits add up to 18, a total 2,332 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 1101010011101
  • 🏠 Its numerical neighbours: 06812 (New Fairfield, CT, 6 mi away) and 06814 (Danbury, CT, 8 mi away).
  • 🔄 Backwards, 06813 becomes 31860, which is not a ZIP code at all.
  • 👥 58 other ZIP codes are made of exactly the same digits (01368, 01863, 03816, 03861, 06138, 06183, …). The farthest-flung twin is 83610 in Cambridge, ID, 2,173 miles away.
  • 🧭 Farther north than 70% of all ZIP codes, and farther east than 92%.
  • 🎯1,318 miles east of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 06813 and you would come out at 41.39°S, 106.55°E — 831 miles from Perth, Australia, the nearest big city to that spot.
  • ☀Longest day of the year: 15h 10m of daylight. Shortest: 9h 11m.
🌙 The sky over 06813 today
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Source: USGS.

Business and tax activity

Business establishments15This ZIP15
Employees62This ZIP62
Annual payroll$4,851,000This ZIP$4,851,000

Land area

ZIP codes near 06813

ZIPCityDistance
06817 Danbury, CT 0.0 mi
06810 Danbury, CT 1.2 mi
06811 Danbury, CT 2.3 mi
06801 Bethel, CT 3.8 mi
06440 Hawleyville, CT 5.6 mi
06804 Brookfield, CT 5.7 mi
06877 Ridgefield, CT 5.8 mi
06812 New Fairfield, CT 6.1 mi
06896 Redding, CT 6.9 mi
06470 Newtown, CT 7.1 mi

Find every ZIP code within 10 miles of 06813 →

Questions about this ZIP code

Where is ZIP code 06813?

06813 is in Danbury, Connecticut, in Fairfield County. Its published point location is 41.3948, -73.4540.

What county is 06813 in?

06813 lies in Fairfield County.

What area code is 06813?

Danbury uses area codes 203 and 475, from NANPA's telephone records.

What time zone is 06813 in?

06813 uses America/New_York.

What ZIP codes are near 06813?

The closest are 06817 (0 mi), 06810 (1.2 mi), 06811 (2.3 mi), 06801 (3.8 mi) and 06440 (5.6 mi).

Is 06813 a PO Box ZIP code?

Possibly. The Census map gives this ZIP code no delivery area of its own, which usually means it serves post office boxes, a single organization or a post office rather than streets of homes.

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Cite this page

zipcodes.pro. “06813 ZIP Code — Danbury, Connecticut (Fairfield County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/06813

Machine-readable version of these facts:

curl https://zipcodes.pro/zip/06813.json

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