Below is a list of Cass County ND zip codes. For your research we have also included Cass County Area Code, Time Zone, UTC and the local County FIPS Code. Each Cass County North Dakota zip code has a center Longitude / Latitude point (the Cass County center is -97.061897277832 / 46.920700073242). For your convenience we have also indicated if that zip code in Cass County observes Daylight Savings time.