Brad Hargreaves, born Bradley William Hargreaves on July 30, 1971 in San Francisco, California, is an American drummer best known for his work with Third Eye Blind (1995 - present).

In 2004, Hargreaves joined the newly formed Year Long Disaster — releasing their debut self-titled album in 2007 with Volcom Entertainment.

Besides working with Suicide Regimen (2002), Refund (2004), and Intoxicated Demons (2005), Hargreaves is an active music composer and actor.