Leonard W. Shaw is a Canadian musician who has toured and recorded with a variety of groups since the 1960s. He is best known as a member of the band The Guess Who since 1991. Prior to joining The Guess Who, he was a member of Ian Thomas' touring band.

As a member of The Guess Who, Shaw plays keyboards, flute and saxophone. He also provides vocals on some tracks. Leonard Shaw is a native of Winnipeg, Manitoba. Among other acts, he also plays in the band All the Kings Men.

Shaw is also known by the nickname "Lewsh".