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/OH/WATERTOWN

Watertown ZIP code, Ohio

The ZIP code for Watertown, OH is 45787, and its area code is 740.

USPS city name
1 ZIP code
Area code
740
State
Ohio

ZIP codes addressed as Watertown

ZIP codes with the USPS city name Watertown
ZIP City Type
45787 Watertown , OH No street area

Towns near Watertown

Towns near Watertown
TownPopulationDistance
Devola 2,688 8.7 mi
Marietta 13,203 10.4 mi
Williamstown, WV 2,980 10.6 mi
Vienna, WV 10,518 11.3 mi
Belpre 6,654 13.0 mi
Blennerhassett, WV 3,282 14.5 mi
Parkersburg, WV 29,240 14.9 mi
Athens 23,396 26.7 mi
The Plains 2,748 27.6 mi

More nearby: every ZIP code in Washington County · Ohio ZIP codes

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zipcodes.pro. “Watertown, OH ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/city/oh/watertown

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