Arden Hills is a city in Ramsey County, Minnesota, United States. The population was 9,552 at the 2010 census. Bethel University and Seminary is located in the city of Arden Hills. Also, the campus of University of Northwestern-St. Paul straddles the Arden Hills – Roseville border. The headquarters of Land O'Lakes and Catholic United Financial, a fraternal benefit society, are located here as well.
In July 2006 the city reached a tentative agreement with the U.S. Government to purchase a large portion of the former Twin Cities Army Ammunition Plant site for $45 million, a deal that could lead to a major new development that would include 2,400 new homes and of commercial space.