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/95378

95378

ZIP 95378 is in Tracy, California, in San Joaquin County; area codes 209 and 350; Pacific time. Tracy has 5 ZIP codes; the others are 95304, 95376, 95377 and 95391.

Type
No street area
Time zone
America/Los_Angeles
County
San Joaquin
Metro area
Stockton-Lodi, CA
Coordinates
37.6761, -121.4330

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 95377, whose figures describe that area — not this ZIP code.

☼ Live from 95378 — Tracy, CA

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Where 95378 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 95378
  • 🔢 Type 95378 into a pocket calculator and turn it upside down: BLESG — not quite a word, sorry.
  • ➕ As a number, 95,378 = 2 × 103 × 463. Its digits add up to 32, a total 644 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 10111010010010010
  • 🏠 Its numerical neighbours: 95377 (Tracy, CA, 5 mi away) and 95379 (Tuolumne, CA, 70 mi away).
  • 🔄 Backwards, 95378 becomes 87359, which is not a ZIP code at all.
  • 👥 39 other ZIP codes are made of exactly the same digits (35897, 35978, 35987, 38579, 38759, 38957, …). The farthest-flung twin is 35978 in Henagar, AL, 1,991 miles away.
  • 🧭 Farther south than 60% of all ZIP codes, and farther west than 95%.
  • 🎯1,237 miles west of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 95378 and you would come out at 37.68°S, 58.57°E — 993 miles from Port-aux-Français, French Southern Territories, the nearest big city to that spot.
  • ☀Longest day of the year: 14h 46m of daylight. Shortest: 9h 33m.
🌙 The sky over 95378 today
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Source: USGS.

Business and tax activity

Business establishments10This ZIP10
Employees233This ZIP233
Annual payroll$27,668,000This ZIP$27,668,000

Land area

ZIP codes near 95378

ZIPCityDistance
95304 Tracy, CA 2.8 mi
95376 Tracy, CA 4.2 mi
95377 Tracy, CA 4.6 mi
95385 Vernalis, CA 11.1 mi
95330 Lathrop, CA 11.4 mi
95391 Tracy, CA 11.6 mi
95337 Manteca, CA 11.6 mi
95387 Westley, CA 13.3 mi
94550 Livermore, CA 13.3 mi
94514 Byron, CA 15.1 mi

Find every ZIP code within 10 miles of 95378 →

Questions about this ZIP code

Where is ZIP code 95378?

95378 is in Tracy, California, in San Joaquin County, part of the Stockton-Lodi, CA metropolitan area. Its published point location is 37.6761, -121.4330.

What county is 95378 in?

95378 lies in San Joaquin County.

What area code is 95378?

Tracy uses area codes 209 and 350, from NANPA's telephone records.

What time zone is 95378 in?

95378 uses America/Los_Angeles.

What ZIP codes are near 95378?

The closest are 95304 (2.8 mi), 95376 (4.2 mi), 95377 (4.6 mi), 95385 (11.1 mi) and 95330 (11.4 mi).

Is 95378 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. “95378 ZIP Code — Tracy, California (San Joaquin County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/95378

Machine-readable version of these facts:

curl https://zipcodes.pro/zip/95378.json

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