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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 91342 Adjacent Zip Codes. 91342 is located in the state of California in the Reno metro area. Zip code 91342 is primarily located in Los Angeles County. The official postal service name used for 91342 is SYLMAR, California.