| James Loster | |
| Birth Name: | James T. Fitzpatrick |
| Birth Date: | 1 January 1894 |
| Birth Place: | Sioux City, IA |
| Death Place: | Pittsburgh, PA |
| Nationality: | American |
| Occupation: | Vaudeville acrobat |
| Years Active: | 1908-1945 |
James Loster (January 1, 1894- April 20, 1948) was the stage name for acrobat James "Jimmy" T. Fitzpatrick. He and his wife performed as James and Bernie Loster. Bernie's real name was Florence Cush Fitzpatrick. He was active on the vaudeville circuit (B. F. Keith, Keith-Albee) from 1914 to 1928.
He was president of the Pittsburgh Branch of the American Guild of Variety Artists (AGVA) and the United Entertainers, Local 921.