Elmer Paul Petersen (September 4, 1928 – August 5, 2020) was an American sculptor who worked in metal. His most prominent artwork is the World's Largest Buffalo in Jamestown, North Dakota. Petersen lived and worked in Galesville, Wisconsin. Much of his art is publicly displayed around La Crosse, Wisconsin, where he led the Downtown La Crosse Sculpture Project Committee. The La Crosse Tribune called Petersen "one of the premier sculptors in the Coulee Region" and "instrumental in getting public sculpture scattered throughout downtown" La Crosse. He has worked significantly with welding, including that of found metal objects, and often sculpted in cast bronze.