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/66601

66601

ZIP 66601 is in Topeka, Kansas, in Shawnee County; area code 785; Central time. Topeka has 31 ZIP codes in all.

Type
No street area
Time zone
America/Chicago
County
Shawnee
Metro area
Topeka, KS
Coordinates
39.0483, -95.6780

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 66612, whose figures describe that area — not this ZIP code.

☼ Live from 66601 — Topeka, KS

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Where 66601 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 66601
  • 🔢 Type 66601 into a pocket calculator and turn it upside down: IOggg — not quite a word, sorry.
  • ➕ 66601 is a prime number. It cannot be divided by anything except 1 and itself. Its digits add up to 19, a total 2,454 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 10000010000101001
  • 🏠 Its numerical neighbours: 66554 (Randolph, KS, 67 mi away) and 66603 (Topeka, KS, 1 mi away).
  • 🔄 Backwards, 66601 becomes 10666, which is not a ZIP code at all.
  • 👥 10 other ZIP codes are made of exactly the same digits (16066, 16660, 60616, 60661, 61606, 66016, …). The farthest-flung twin is 16660 in Mc Connellstown, PA, 944 miles away.
  • 🧭 Farther south than 50% of all ZIP codes, and farther west than 70%.
  • 🎯164 miles east of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 66601 and you would come out at 39.05°S, 84.32°E — 994 miles from Port-aux-Français, French Southern Territories, the nearest big city to that spot.
  • ☀Longest day of the year: 14h 55m of daylight. Shortest: 9h 25m.
🌙 The sky over 66601 today
  • Working out the sun…
🌋 Shake report
  • Checking the USGS…

Source: USGS.

Business and tax activity

Business establishments22This ZIP22
Employees403This ZIP403
Annual payroll$36,049,000This ZIP$36,049,000

Land area

ZIP codes near 66601

ZIPCityDistance
66625 Topeka, KS 0.0 mi
66626 Topeka, KS 0.0 mi
66629 Topeka, KS 0.0 mi
66630 Topeka, KS 0.0 mi
66636 Topeka, KS 0.0 mi
66683 Topeka, KS 0.0 mi
66699 Topeka, KS 0.0 mi
66612 Topeka, KS 0.6 mi
66603 Topeka, KS 0.7 mi
66621 Topeka, KS 1.7 mi

Find every ZIP code within 10 miles of 66601 →

Questions about this ZIP code

Where is ZIP code 66601?

66601 is in Topeka, Kansas, in Shawnee County, part of the Topeka, KS metropolitan area. Its published point location is 39.0483, -95.6780.

What county is 66601 in?

66601 lies in Shawnee County.

What area code is 66601?

Topeka uses area code 785, from NANPA's telephone records.

What time zone is 66601 in?

66601 uses America/Chicago.

What ZIP codes are near 66601?

The closest are 66625 (0 mi), 66626 (0 mi), 66629 (0 mi), 66630 (0 mi) and 66636 (0 mi).

Is 66601 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. “66601 ZIP Code — Topeka, Kansas (Shawnee County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/66601

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