Delusional Thomas is a mixtape by American rapper Mac Miller under the alias Delusional Thomas. The mixtape was released as a free digital download on November 1, 2013 via a newly created website delusionalthomas.com.

Malcolm James McCormick, known professionally as Mac Miller, was an American rapper, singer-songwriter, and record producer. Miller began his career in Pittsburgh's local hip hop scene in 2007, at the age of 15. In 2010, he signed a record deal with independent label Rostrum Records and released his breakthrough mixtapes K.I.D.S. (2010) and Best Day Ever (2011). Miller's debut studio album, Blue Slide Park (2011), became the first independently distributed debut album to top the US Billboard 200 since 1995.