William Lang

William Lang may refer to:

• William Lang (American football), coach of the Maryland Terrapins football team, 1908–1909
• William Henry Lang (1874–1960), British botanist
• William Dickson Lang (1878–1966), keeper of the department of geology at the British Museum, 1928–1938
• William Lang (British athlete) (c. 1838–?), professional British runner
• William Lang (architect) (1846–1897), American architect

• Bill Lang (William Langfranchi, 1883–1952), Australian professional boxer
• Bill Lang (rower) (born 1956), British Olympic rower
• Bill Lange (disambiguation)