Grand Forks is a city and the county seat of Grand Forks County, North Dakota, United States. The population was 59,166 at the 2020 census, and was estimated to be 59,845 in 2024, 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.