Ellendale is a city in Dickey County, North Dakota, United States. It is the county seat of Dickey County. The population was 1,394 at the 2010 census. Ellendale was founded in 1882. Ellendale is the home of Trinity Bible College, located on the former campus of the North Dakota State Normal and Industrial School and the Ellendale Opera House currently under renovation. The city Is mentioned In "Zen and the Art of Motorcycle Maintenance" by Robert M.