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/82605

82605

ZIP 82605 is in Casper, Wyoming, in Natrona County; area code 307; Mountain time. Casper has 5 ZIP codes; the others are 82601, 82602, 82604 and 82609.

Type
No street area
Time zone
America/Denver
County
Natrona
Metro area
Casper, WY
Coordinates
42.8666, -106.3131

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 82601, whose figures describe that area — not this ZIP code.

☼ Live from 82605 — Casper, WY

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Where 82605 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 82605
  • 🔢 Type 82605 into a pocket calculator and turn it upside down: SOgZB — not quite a word, sorry.
  • ➕ As a number, 82,605 = 3 × 5 × 5507. Its digits add up to 21, a total 2,594 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 10100001010101101
  • 🏠 Its numerical neighbours: 82604 (Casper, WY, 20 mi away) and 82609 (Casper, WY, 9 mi away).
  • 🔄 Backwards, 82605 becomes 50628 — and that is a real ZIP code: Elma, IA, 702 miles away.
  • 👥 61 other ZIP codes are made of exactly the same digits (02568, 02865, 05682, 05826, 05862, 06258, …). The farthest-flung twin is 02568 in Vineyard Haven, MA, 1,817 miles away.
  • 🧭 Farther north than 82% of all ZIP codes, and farther west than 84%.
  • 🎯452 miles northwest of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 82605 and you would come out at 42.87°S, 73.69°E — 478 miles from Port-aux-Français, French Southern Territories, the nearest big city to that spot.
  • ☀Longest day of the year: 15h 21m of daylight. Shortest: 9h 01m.
🌙 The sky over 82605 today
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🌋 Shake report
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Source: USGS.

Business and tax activity

Business establishments39This ZIP39
Employees272This ZIP272
Annual payroll$22,743,000This ZIP$22,743,000

Land area

ZIP codes near 82605

ZIPCityDistance
82602 Casper, WY 2.7 mi
82644 Mills, WY 3.5 mi
82636 Evansville, WY 8.3 mi
82609 Casper, WY 9.2 mi
82601 Casper, WY 14.1 mi
82604 Casper, WY 20.2 mi
82637 Glenrock, WY 24.3 mi
82646 Natrona, WY 24.3 mi
82648 Powder River, WY 34.4 mi
82643 Midwest, WY 38.4 mi

Find every ZIP code within 10 miles of 82605 →

Questions about this ZIP code

Where is ZIP code 82605?

82605 is in Casper, Wyoming, in Natrona County, part of the Casper, WY metropolitan area. Its published point location is 42.8666, -106.3131.

What county is 82605 in?

82605 lies in Natrona County.

What area code is 82605?

Casper uses area code 307, from NANPA's telephone records.

What time zone is 82605 in?

82605 uses America/Denver.

What ZIP codes are near 82605?

The closest are 82602 (2.7 mi), 82644 (3.5 mi), 82636 (8.3 mi), 82609 (9.2 mi) and 82601 (14.1 mi).

Is 82605 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. “82605 ZIP Code — Casper, Wyoming (Natrona County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/82605

Machine-readable version of these facts:

curl https://zipcodes.pro/zip/82605.json

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