Gregory Tristan "Tris" Imboden (born July 27, 1951) is an American rock and jazz drummer. As a performer, he has performed in studio sessions and toured with some of the most notable and highest-selling musicians of all time. He was the drummer for the multi-platinum band Chicago from 1990 to 2018. He is a multi-platinum selling artist. As an educator, he has been a drum clinician and author of tutorial materials.

Some of Imboden's most notable work include recordings with Neil Diamond, Kenny Loggins, Firefall, Richard Marx, Steve Vai, Roger Daltrey, Crosby, Stills & Nash, Chicago, Anita Baker, Julio Iglesias and Stevie Wonder.

As a full-time band member, Imboden's career has included Honk, the Kenny Loggins Band (including "Who's Right, Who's Wrong" featuring Michael Jackson, the six-time platinum Number One hit "Footloose", and "I'm Alright" from Caddyshack), and Chicago. His career with Chicago has seen the release of thirteen albums, several of them certified platinum.

Aside from a brief, early move to Germany, Tris Imboden was raised in various beachside communities of Orange County in Southern California.

I still remember the day my dad took me to a Fourth of July parade in Huntington Beach. This marching band from Compton came down the street and the cadence that they were playing almost made me hysterical. I didn't know whether to laugh or cry.

... the drum section was just smoking ... I was so deeply moved. But I knew at that moment that was what I was going to have to do.

So from that point on I was always drawn toward drums.

— Tris Imboden