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/SD/STEPHAN

Stephan ZIP code, South Dakota

The ZIP code for Stephan, SD is 57346, and its area code is 605.

USPS city name
1 ZIP code
Population
13
Area code
605

NANPA lists no telephone rate centre for Stephan itself, so these are the area codes of the nearest one, Fort Thompson (8.5 miles). A town on an area-code boundary can differ from its neighbour.

ZIP codes addressed as Stephan

ZIP codes with the USPS city name Stephan
ZIP City Type Population Median income Median home
57346 Stephan , SD Standard 13 — —

Map of Stephan ZIP codes

The ZIP codes of Stephan, SD, 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 Stephan

The nearest larger towns are Lower Brule (743 people, 14 mi), Fort Thompson (1,147 people, 14 mi) and West Brule (471 people, 15 mi).

More nearby: every ZIP code in Hyde County · South Dakota ZIP codes

Cite this page

zipcodes.pro. “Stephan, SD ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/city/sd/stephan

Underlying data is public domain or openly licensed — sources, vintages and licences.