West Fargo is a city in Cass County, North Dakota in the United States. As of 2006, the city population was 20,300. West Fargo is the state of North Dakota's fastest growing major city and is located directly adjacent to the city of Fargo. West Fargo was founded in 1926. West Fargo apartments for rent comparison page shows most up to date rent information on West Fargo apartments and houses. Rent information is obtained from multiple rental sources but we cannot guarantee their accuracy.