Dennis Walaker (January 10, 1941 – December 2, 2014) was an American politician who served as 34th mayor of Fargo, North Dakota. He was elected to a four-year term on June 13, 2006 and took office on June 28, 2006. He was re-elected twice during municipal elections held on June 8, 2010 and June 10, 2014. Walaker died in office during his third term as mayor. His deputy mayor, Tim Mahoney, served as mayor for the remainder of Mayor Walaker's final term.