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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/MT/DECKER

Decker ZIP code, Montana

The ZIP code for Decker, MT is 59025, and its area code is 406.

USPS city name
1 ZIP code
Population
53
Area code
406
State
Montana

ZIP codes addressed as Decker

ZIP codes with the USPS city name Decker
ZIP City Type Population Median income Median home
59025 Decker , MT Standard 53 $36,500 —

Map of Decker ZIP codes

59025

The ZIP codes of Decker, MT, 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 Decker

The nearest larger towns are Sheridan, WY (19,285 people, 24 mi), Ranchester, WY (1,277 people, 26 mi) and Powder Horn, WY (702 people, 30 mi).

Towns near Decker
TownPopulationDistance
Sheridan, WY 19,285 23.7 mi

More nearby: every ZIP code in Big Horn County · Montana ZIP codes

Cite this page

zipcodes.pro. “Decker, MT ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/city/mt/decker

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