Grassy Butte, ND is a city located in Mckenzie County, North Dakota and has a land area of 375.43 square miles (972.36 km2). The water area for the city is 1.78 square miles or 4.61 km2. There is one unique zip code in Grassy Butte, North Dakota and it is 58634. The area code(s) for Grassy Butte is 701.
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