Harwood is a city in Cass County, North Dakota, United States. The population was 794 at the 2020 census. It has become a bedroom co…Harwood is a city in Cass County, North Dakota, United States. The population was 794 at the 2020 census. It has become a bedroom community of the nearby Fargo-Moorhead area. Harwood was founded in 1881.