Robert Frederick Sink (April 3, 1905 – December 13, 1965) was a senior United States Army officer who fought during World War II, the Korean War, and early parts of the Vietnam War, though he was most famous for his command of the 506th Parachute Infantry Regiment, part of the 101st Airborne Division, throughout most of World War II, in France, Holland and Belgium.
Sink is portrayed in the television miniseries Band of Brothers by Captain Dale Dye.