Mabel Harris Conkling's work was included in the 1900 Paris Exposition, the 1904 St. Louis World's Fair, the 1908 Baltimore Sculpture Exhibition, at the National Academy of Design, Harrisburg City Hall, and many other shows. She specialized in public sculptures, including fountains, relief panels, trophies, and cemetery urns. She also made portrait busts in bronze, and bas relief medallions. A bas relief bronze portrait of Ethel Barrymore, by Mabel Conkling, is in the collection of the National Portrait Gallery, Smithsonian Institution. A bronze statue by Conkling was presented to theatre professional Samuel Roxy Rothafel in 1931, and a bronze loving cup by Conkling was presented to musician Walter Damrosch in 1933, both presentations by the New York Federation of Women's Clubs.