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 — STATE/VI/COUNTY/ST-JOHN-ISLAND

St. John Island, VI ZIP codes

St. John Island, VI has one ZIP code: 00830.

ZIP codes
1
Towns
1
County FIPS
78020
Land area
20 sq mi

St. John Island ZIP codes by town

Each ZIP code is listed under the county most of its land lies in and the town the Postal Service names it for; a ZIP code's own page shows exactly how it is split.

Map of St. John Island ZIP codes

00830

The ZIP codes of St. John Island, 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.

Not sure you are in St. John Island? What county am I in? answers from your location, near a county line included.

Every ZIP code in St. John Island, with figures

ZIP codes in St. John Island
ZIP City Type
00830 St John , VI Standard

Cite this page

zipcodes.pro. “St. John Island ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/state/vi/county/st-john-island

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