Jeff Russo (born August 31, 1969) is a composer, songwriter, guitarist, vocalist and producer, best known as a founding member of American rock band Tonic. He is also a founding member of acoustic rock band Low Stars.
Recently he has scored films, TV programs and commercials, including the ABC dramas The Unusuals and My Generation, the NBC drama Crossing Jordan, the USA network show Necessary Roughness, the CBS network show Hostages and currently scores the FX drama Fargo and the Starz drama Power. He is currently scoring the second season of Extant, replacing Marcelo Zarvos and is about to begin his second season scoring CSI: Cyber. He has also worked with fellow composers Wendy Melvoin and Lisa Coleman.