Mark Naftalin is an American blues keyboardist and record producer. He appears on the first five albums by Paul Butterfield Blues Band in the mid 1960s as a band member, and as such was inducted into the Rock and Roll Hall of Fame in 2015. He later worked onstage with the late fellow Butterfield Band member Mike Bloomfield and has been active from his home in Marin County, California, in the San Francisco Bay Area as a festival and radio producer for several decades.