USS William R. Rush (DE-556)

USS William R. Rush (DE-556) was a proposed World War II United States Navy John C. Butler-class destroyer escort that was never completed.

William R. Rush was to have been built at the Boston Navy Yard in Boston, Massachusetts. Her construction contract was cancelled on 10 June 1944.

The name William R. Rush was reassigned to the destroyer USS William R. Rush (DD-714).