James Joseph Chamberlin (born June 10, 1964) is an American drummer, songwriter and producer. He is best known as the drummer for the alternative rock band The Smashing Pumpkins. After a drug-related incident with touring keyboardist Jonathan Melvoin in 1996, Chamberlin was fired from the band and joined The Last Hard Men, but rejoined the Pumpkins in late 1998. Following the 2000 breakup of the band, Chamberlin joined Pumpkins frontman Billy Corgan in the supergroup Zwan and also formed his own group, the Jimmy Chamberlin Complex. In 2005 Chamberlin joined Corgan in reforming The Smashing Pumpkins.

Chamberlin, who originally trained as a jazz drummer, cites jazz musicians Benny Goodman, Duke Ellington, Gene Krupa and Buddy Rich, as well as rock drummers Keith Moon and John Bonham as major influences on his technique. While he is known as "one of the most powerful drummers in rock," he primarily strives for emotionally communicative playing.