William Stanley, 6th Earl of Derby, English politician, Lord Lieutenant of Cheshire (b. 1561)
William Stanley, 6th Earl of Derby, KG (1561 – 29 September 1642) was an English nobleman and politician. Stanley inherited a prominent social position that was both dangerous and unstable, as his mother was heir to Queen Elizabeth I under the Third Succession Act, a position inherited in 1596 by his deceased brother's oldest daughter, Anne, two years after William had inherited the Earldom from his brother. After a period of European travel in his youth, a long legal battle eventually consolidated his social position. Nevertheless, he was careful to remain circumspect in national politics, devoting himself to administration and cultural projects, including playwriting.

His own literary works are lost or unidentified, but in the 1890s he was put forward as one of the contenders to be the true author of the works of William Shakespeare, according to some proponents of the Shakespeare authorship question.