Tony Markellis is a bassist and record producer from Helena, Montana, now residing in Saratoga Springs, New York.

His career spans over thirty-five years, playing blues, folk, jazz, rock and country music with such diverse artists as Paul Butterfield, Johnny Shines, David Bromberg, David Amram, The Unknown Blues Band featuring Big Joe Burrell, Paul Siebel, Rosalie Sorrels, Eric Von Schmidt, Ellen McIlwaine, Esther Satterfield, Mary McCaslin, Michael Jerling, Bob Warren and Rosanne Raneri.