Below is a list of Seneca OR zip codes. For your research we have also included Seneca Area Code, Time Zone, UTC and the local Grant County FIPS Code. Each Seneca Oregon zip code has a center Longitude / Latitude point (the Seneca center is -118.97200012207 / 44.133899688721). For your convenience we have also indicated if that zip code in Seneca observes Daylight Savings time.