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/78691

78691

ZIP 78691 is in Pflugerville, Texas, in Travis County; area codes 512 and 737; Central time. Pflugerville has 2 ZIP codes; the other is 78660.

Type
No street area
Time zone
America/Chicago
County
Travis
Coordinates
30.4394, -97.6200

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 78660, whose figures describe that area — not this ZIP code.

☼ Live from 78691 — Pflugerville, TX

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Where 78691 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 78691
  • 🔢 Type 78691 into a pocket calculator and turn it upside down: IGgBL — not quite a word, sorry.
  • ➕ 78691 is a prime number. It cannot be divided by anything except 1 and itself. Its digits add up to 31, a total 799 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 10011001101100011
  • 🏠 Its numerical neighbours: 78683 (Round Rock, TX, 15 mi away) and 78701 (Austin, TX, 14 mi away).
  • 🔄 Backwards, 78691 becomes 19687, which is not a ZIP code at all.
  • 👥 23 other ZIP codes are made of exactly the same digits (16879, 17968, 18769, 18976, 68179, 68197, …). The farthest-flung twin is 96817 in Honolulu, HI, 3,752 miles away.
  • 🧭 Farther south than 92% of all ZIP codes, and farther west than 76%.
  • 🎯651 miles south of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 78691 and you would come out at 30.44°S, 82.38°E — 1,453 miles from Port-aux-Français, French Southern Territories, the nearest big city to that spot.
  • ☀Longest day of the year: 14h 07m of daylight. Shortest: 10h 11m.
🌙 The sky over 78691 today
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Source: USGS.

Business and tax activity

Business establishments27This ZIP27
Employees206This ZIP206
Annual payroll$10,505,000This ZIP$10,505,000

Land area

ZIP codes near 78691

ZIPCityDistance
78660 Pflugerville, TX 1.5 mi
78764 Austin, TX 2.4 mi
78728 Austin, TX 4.1 mi
78664 Round Rock, TX 4.8 mi
78753 Austin, TX 5.0 mi
78754 Austin, TX 5.8 mi
78727 Austin, TX 5.9 mi
78758 Austin, TX 6.3 mi
78665 Round Rock, TX 7.6 mi
78763 Austin, TX 8.0 mi

Find every ZIP code within 10 miles of 78691 →

Questions about this ZIP code

Where is ZIP code 78691?

78691 is in Pflugerville, Texas, in Travis County, part of the Austin-Round Rock-San Marcos, TX metropolitan area. Its published point location is 30.4394, -97.6200.

What county is 78691 in?

78691 lies in Travis County.

What area code is 78691?

Pflugerville uses area codes 512 and 737, from NANPA's telephone records.

What time zone is 78691 in?

78691 uses America/Chicago.

What ZIP codes are near 78691?

The closest are 78660 (1.5 mi), 78764 (2.4 mi), 78728 (4.1 mi), 78664 (4.8 mi) and 78753 (5 mi).

Is 78691 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. “78691 ZIP Code — Pflugerville, Texas (Travis County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/78691

Machine-readable version of these facts:

curl https://zipcodes.pro/zip/78691.json

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