Manvel is a city in Grand Forks County, North Dakota, United States. It sits on the banks of the Turtle River. It is part of the "Grand Forks, ND-M…Manvel is a city in Grand Forks County, North Dakota, United States. It sits on the banks of the Turtle River. It is part of the "Grand Forks, ND-MN Metropolitan Statistical Area" or "Greater Grand Forks". The population was 377 at the 2020 census. Manvel was founded in 1881.