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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/19366

19366

ZIP 19366 is Pocopson, Pennsylvania, in Chester County; area codes 484, 610 and 835; Eastern time.

Type
No street area
Time zone
America/New_York
County
Chester
Coordinates
39.9004, -75.6258

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 19382, whose figures describe that area — not this ZIP code.

☼ Live from 19366 — Pocopson, PA

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Where 19366 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 19366
  • 🔢 Type 19366 into a pocket calculator and turn it upside down: ggEGI — not quite a word, sorry.
  • ➕ As a number, 19,366 = 2 × 23 × 421. Its digits add up to 25, a total 2,242 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 100101110100110
  • 🏠 Its numerical neighbours: 19365 (Parkesburg, PA, 17 mi away) and 19367 (Pomeroy, PA, 14 mi away).
  • 🔄 Backwards, 19366 becomes 66391, which is not a ZIP code at all.
  • 👥 21 other ZIP codes are made of exactly the same digits (13669, 13696, 16369, 16639, 16693, 16936, …). The farthest-flung twin is 93661 in Santa Rita Park, CA, 2,415 miles away.
  • 🧭 Farther north than 55% of all ZIP codes, and farther east than 86%.
  • 🎯1,214 miles east of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 19366 and you would come out at 39.90°S, 104.37°E — 844 miles from Perth, Australia, the nearest big city to that spot.
  • ☀Longest day of the year: 15h 00m of daylight. Shortest: 9h 20m.
🌙 The sky over 19366 today
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Source: USGS.

Land area

ZIP codes near 19366

ZIPCityDistance
19382 West Chester, PA 2.0 mi
19383 West Chester, PA 2.7 mi
19317 Chadds Ford, PA 2.9 mi
19357 Mendenhall, PA 3.3 mi
19381 West Chester, PA 4.3 mi
19395 Westtown, PA 4.8 mi
19373 Thornton, PA 4.9 mi
19348 Kennett Square, PA 5.5 mi
19319 Cheyney, PA 5.7 mi
19340 Concordville, PA 5.7 mi

Find every ZIP code within 10 miles of 19366 →

Questions about this ZIP code

Where is ZIP code 19366?

19366 is in Pocopson, Pennsylvania, in Chester County, part of the Philadelphia-Camden-Wilmington, PA-NJ-DE-MD metropolitan area. Its published point location is 39.9004, -75.6258.

What county is 19366 in?

19366 lies in Chester County.

What area code is 19366?

Pocopson uses area codes 484, 610 and 835, from NANPA's telephone records.

What time zone is 19366 in?

19366 uses America/New_York.

What ZIP codes are near 19366?

The closest are 19382 (2 mi), 19383 (2.7 mi), 19317 (2.9 mi), 19357 (3.3 mi) and 19381 (4.3 mi).

Is 19366 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. “19366 ZIP Code — Pocopson, Pennsylvania (Chester County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/19366

Machine-readable version of these facts:

curl https://zipcodes.pro/zip/19366.json

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