Carl Eller (born January 25, 1942) is a former professional American football player in the National Football League (NFL) who played from 1964 through 1979. He was born in Winston-Salem, North Carolina and attended the University of Minnesota. He was elected to the Pro Football Hall of Fame in 2004.

Karl Eller (June 20, 1928 – March 10, 2019) was an American businessman and entrepreneur.

Carl Adam Johann Nepomuk Zeller (19 June 1842 – 17 August 1898) was an Austrian composer of operettas.

Karl Zoller (born August 30, 1963) is an American professional golfer who played on the Nationwide Tour.