Grand Forks is a city in and the county seat of Grand Forks County, North Dakota, United States. The city's population was 59,166 as of the 2020 census, making it the third-most populous city in the state, after Fargo and Bismarck. Grand Forks, along with its twin city of East Grand Forks, Minnesota, forms the center of the Grand Forks metropolitan statistical area, which is often called Greater Grand Forks or the Grand Cities.