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Helvetia (OR state) ZIP code. ZIP code of Helvetia (OR) is 97124. Below you can find map of Helvetia, or look up other ZIP codes in Oregon or other US states. If Helvetia's ZIP code is duplicated, and other places have same ZIP code number, you can use our ZIP code searcher by number 97124.
Zip Code 59840 Description. Zip Code 59840 is located in the state of Montana in the Missoula metro area. Zip code 59840 is primarily located in Ravalli County. The official US Postal Service name for 59840 is HAMILTON, Montana. Portions of zip code 59840 are contained within or border the city limits of Hamilton, MT, Pinesdale, MT, . The area code for zip code 59840 is 406.