Thomas D. (born Thomas Dürr, 30 December 1968 in Ditzingen, near Stuttgart, Germany) is a rapper in the German hip hop group Die Fantastischen Vier. He frequently works on solo projects.

Thomas D. is a member of Die Fantastischen Vier, but was also successful with his solo albums Solo (1997), Lektionen in Demut (2001), and Kennzeichen D (2008). Singles released from these albums include Rückenwind, Frisör, Liebesbrief, and Solo (featuring Nina Hagen). Outside Germany, he is probably best known for Wish (Komm zu mir) which he performed with Franka Potente on the soundtrack of the movie Run Lola Run. He was also the singer and songwriter of the band Son Goku, who entered the German charts with Alle für Jeden (album: Crashkurs) in 2002. In 2010 he made the song "Million Voices (7 Seconds)" The biggest online choir from Thomas D and Telekom (T-Mobile). In 2012, he will be the jury president of Unser Star für Baku, the German selection for the Eurovision Song Contest 2012 in Baku. He voiced Kowalski in the Madagascar film series.