William Boyd Rankin (born 5 July 1984) is an Northern Irish cricketer who plays international cricket for Ireland, and briefly also played for England. He is a right-arm medium-fast bowler. He is the brother of fellow cricketer David Rankin.
Born in Derry, Rankin is a tall bowler who stands at 6 ft 8 inches and has a distinctive bouncing action in his bowling. Rankin revealed in an interview that his action is modelled on bowlers like Curtly Ambrose and Glenn McGrath who "hit the deck from just back of a length outside off stump". He studied Agriculture at Harper Adams University College in Shropshire, during which time he worked on his batting technique.