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 — CITY/TX/O-BRIEN

O Brien ZIP code, Texas

The ZIP code for O Brien, TX is 79539, and its area code is 940.

USPS city name
1 ZIP code
Population
130
Area code
940
State
Texas

NANPA lists no telephone rate centre for O Brien itself, so these are the area codes of the nearest one, Rochester (4.9 miles). A town on an area-code boundary can differ from its neighbour.

ZIP codes addressed as O Brien

ZIP codes with the USPS city name O Brien
ZIP City Type Population Median income Median home
79539 O Brien , TX Standard 220 $46,250 —

Map of O Brien ZIP codes

The ZIP codes of O Brien, TX, shaded. Outlines are Census ZIP Code Tabulation Areas (2020), which approximate the mail routes; PO-box and single-address codes have no area and are not drawn. Click any area to open its ZIP code.

Towns near O Brien

The nearest larger towns are Knox City (974 people, 3.0 mi), Rochester (228 people, 4.6 mi) and Weinert (235 people, 11 mi).

Towns near O Brien
TownPopulationDistance
Haskell 2,817 16.5 mi
Stamford 2,917 27.1 mi

More nearby: every ZIP code in Haskell County · Texas ZIP codes

Cite this page

zipcodes.pro. “O Brien, TX ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/city/tx/o-brien

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