Robert Claflin Rusack (June 16, 1926 – July 16, 1986) was the fourth bishop of Los Angeles in the Episcopal Church from 1974 until his death in 1986.

[citation needed] In 1951 Rusack was ordained priest and was subsequently appointed vicar of St James's Church in Deer Lodge, Montana.

Whilst there he was also responsible of the day school in his parish and also the parochial mission of St Aidan in Malibu, California.

Rusack took the decision to demolish St Paul's Cathedral in Los Angeles, which suffered extensive damage in an earthquake.

Rusack died on July 16, 1986, as a result of a heart attack in Pacific Palisades, Los Angeles.