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/66620

66620

ZIP 66620 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
39.0429, -95.7697

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 66615, whose figures describe that area — not this ZIP code.

☼ Live from 66620 — Topeka, KS

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Where 66620 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 66620
  • 🔢 Type 66620 into a pocket calculator and turn it upside down: OZggg — not quite a word, sorry.
  • ➕ As a number, 66,620 = 2 × 2 × 5 × 3331. Its digits add up to 20, a total 2,586 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 10000010000111100
  • 🏠 Its numerical neighbours: 66619 (Topeka, KS, 8 mi away) and 66621 (Topeka, KS, 4 mi away).
  • 🔄 Backwards, 66620 becomes 02666 — and that is a real ZIP code: Truro, MA, 1,362 miles away.
  • 👥 8 other ZIP codes are made of exactly the same digits (02666, 06266, 26660, 60626, 62660, 66026, …). The farthest-flung twin is 02666 in Truro, MA, 1,362 miles away.
  • 🧭 Farther south than 50% of all ZIP codes, and farther west than 71%.
  • 🎯159 miles east of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 66620 and you would come out at 39.04°S, 84.23°E — 991 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 66620 today
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🌋 Shake report
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Source: USGS.

Land area

ZIP codes near 66620

ZIPCityDistance
66624 Topeka, KS 0.0 mi
66647 Topeka, KS 0.0 mi
66667 Topeka, KS 0.0 mi
66675 Topeka, KS 0.0 mi
66604 Topeka, KS 2.4 mi
66622 Topeka, KS 2.8 mi
66606 Topeka, KS 3.0 mi
66621 Topeka, KS 3.7 mi
66611 Topeka, KS 4.3 mi
66614 Topeka, KS 4.3 mi

Find every ZIP code within 10 miles of 66620 →

Questions about this ZIP code

Where is ZIP code 66620?

66620 is in Topeka, Kansas, in Shawnee County, part of the Topeka, KS metropolitan area. Its published point location is 39.0429, -95.7697.

What county is 66620 in?

66620 lies in Shawnee County.

What area code is 66620?

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

What time zone is 66620 in?

66620 uses America/Chicago.

What ZIP codes are near 66620?

The closest are 66624 (0 mi), 66647 (0 mi), 66667 (0 mi), 66675 (0 mi) and 66604 (2.4 mi).

Is 66620 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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zipcodes.pro. “66620 ZIP Code — Topeka, Kansas (Shawnee County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/66620

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