Grassy Butte is an unincorporated community in southeastern McKenzie County, North Dakota, United States.

[2] Grassy Butte currently has a gas station/convenience store and a bar.

The residents now send their children to either Killdeer, Watford City or Belfield schools.

It is where Roxanna's house is located in Peace Like a River by Leif Enger.

[citation needed] The Grassy Butte Post Office, owned by the McKenzie County Historical Society, is listed on the National Register of Historic Places.