William Cary

• William Cary (MP for Mitchell), represented Mitchell (UK Parliament constituency)
• William J. Cary, U.S. Representative from Wisconsin
• William L. Cary, Chairman of the U.S. Securities and Exchange Commission
• William Dennison Cary, founder and namesake of Cary, Illinois
• William Cary (instrument maker), English maker of scientific instruments
• William Cary (1437–1471), gentry; beheaded after Battle of Tewkesbury
• W. Sterling Cary, American Christian minister