William McNamara (disambiguation)

William McNamara (born 1965) is an American actor.

William McNamara may also refer to:


 * William J. McNamara (1879–?), mayor of Edmonton
 * William Craig McNamara (1904–1984), president of the Canadian Wheat Board and Canadian Senator
 * Bill McNamara (1876–1959), Australian rules footballer
 * William McNamara (soldier) (1835–1912), Irish-born soldier in the 4th U.S. Army Cavalry
 * William McNamara (horticulturist), American horticulturist