Briarwood is a city in Cass County, North Dakota, United States. The population was 57 at the 2020 census. Briarwood was founded in 19…Briarwood is a city in Cass County, North Dakota, United States. The population was 57 at the 2020 census. Briarwood was founded in 1973. It is a suburb directly adjacent to the city of Fargo. According to the United States Census Bureau, the city has a total area of 0.15 square miles, all land.