Brien Thomas "B. T." Collins (October 17, 1940 – March 19, 1993) was an American politician from California and a member of the Republican party.
Born in New York City, Collins served as a Green Beret Captain during the Vietnam War and lost his right arm and right leg to a grenade attack in 1967. Upon returning to the United States, Collins enrolled at Santa Clara University, earning a B.A. in 1970 and a J.D. in 1973.
In 1981, Collins was appointed by Democratic Governor Jerry Brown as Director of the California Conservation Corps. During his California Conservation Corps service, Collins gained notoriety for drinking a beaker of malathion to demonstrate his belief that it was safe.
Although a Democrat, Brown nevertheless appointed the conservative Republican Collins to replace Gray Davis as his chief of staff, a position Collins held until Brown left office in 1983.
Collins served as chief deputy to Republican California State Treasurer Tom Hayes from 1989 until 1991, when Hayes left office and Republican Governor Pete Wilson appointed him as director of the California Youth Authority.