William, Willie, Will or Bill Crosbie may refer to:
William Crosbie (British Army officer) (1740–1798), British general William Crosbie (artist) (1915–1999), Scottish artist William Crosbie, 1st Earl of Glandore (1716–1781), Irish politician William Francis Crosbie (died 1768), Irish member of parliament William Crosbie (engineer), engineer and transportation planner in New Jersey Sir William Crosbie, 8th Baronet (1855–1936)