Stewart Graham Lee (born 5 April 1968) is an English comedian. His stand-up routine is characterised by repetition, internal reference, and deadpan delivery.

Lee began his career in 1989 and formed the comedy duo Lee and Herring with Richard Herring. In 2001, he co-wrote and co-directed the West End hit musical Jerry Springer: The Opera, a critical success that sparked a backlash from Christian right groups who staged a series of protests outside its early stagings. In 2011, he won British Comedy Awards for Best Male Television Comic and Best Comedy Entertainment Programme for his series Stewart Lee's Comedy Vehicle. He has written music reviews for publications including The Sunday Times.

In 2009 The Times referred to Lee as "the comedian's comedian, and for good reason" and named him "face of the decade". In 2012, he was placed at No. 9 on a poll of the 100 most influential people in UK comedy. In 2018, The Times named him as the best current English-language comedian.