Jeff Sipe (born January 31, 1959), also known as Apt. Q258, is an American drummer. He works mainly in rock and jazz fusion. He is a founding member of Aquarium Rescue Unit with Bruce Hampton. He was a member of Leftover Salmon and the Zambiland Orchestra, an experimental big band with members of Phish and Widespread Panic. He has toured with Trey Anastasio, Jeff Coffin, Jimmy Herring, Warren Haynes, Keller Williams, John McLaughlin, and guitarist Shawn Lane.

With Aquarium Rescue Unit

As member

With Jeff Coffin

With Jonas Hellborg

With Susan Tedeschi

With Keller Williams

With others