William Gager (1555–1622) was an English jurist, now known for his Latin dramas.
His works were produced at the University of Oxford, from 1582 to 1592. He was considered one of the major dramatists of the late sixteenth century. Apart from one comedy, Rivales, which has not survived, his works were all Latin tragedies. They include Meleager (1582), Dido (1583) and Ulysses Redux (1592). He stayed closer to the model of Senecan tragedy than other contemporaries, and adapted Seneca's Hippolytus in 1592, with the addition of scenes.