Roger Dearborn Lapham (December 6, 1883 April 16, 1966) was a shipowner and businessman who served as the 32nd mayor of San Francisco from 1944 to 1948. Lapham was born in New York City, the son of Antoinette N. (née Dearborn) and businessman Lewis Henry Lapham. He was educated at Harvard, a member of the Pacific Union Club and president of the American-Hawaiian Steamship Company beginning in 1925. Lapham championed the employers' position in the 1936 waterfront strike and was elevated as a "business" Mayor by a member of the Police Commission, J. Ward Maillard, after collapse of the Angelo Rossi constituency. Upon taking the mayor's seat, Lapham declared his intention to serve only one term. According to Radebaugh, Lapham was "so convinced of the employers' cause that he took on Harry Bridges, leader of the striking (C.I.O.) Congress of Industrial Organizations longshoremen, in public debate."