Arden Hills is a city in Ramsey County, Minnesota, United States. The population was 9,939 at the 2020 census. Bethel University and its seminary is located in the city. Also, the campus of University of Northwestern – St. Paul straddles the Arden Hills – Roseville border. The city contains the headquarters of Land O'Lakes and Catholic United Financial, a fraternal benefit society. Boston Scientific also has a large campus within Arden Hills as well.