Below is a list of Grassy Butte ND zip codes. For your research we have also included Grassy Butte Area Code, Time Zone, UTC and the local Mckenzie County FIPS Code. Each Grassy Butte North Dakota zip code has a center Longitude / Latitude point (the Grassy Butte center is -103.2440032959 / 47.393901824951). For your convenience we have also indicated if that zip code in Grassy Butte observes Daylight Savings time.