John W. Eckert (born March 13, 1939, Leonia, New Jersey) is an American jazz trumpeter, known primarily as a big band sideman.
Eckert studied with Kenny Dorham in the late 1950s and graduated from the University of Rochester Eastman School of Music in 1961. He was a member of the Delta Upsilon Fraternity. Following this, he entered a master's program at the University of North Texas. In 1964 he began playing regularly in big band ensembles, working with Stan Kenton and Si Zentner; he played with Maynard Ferguson from 1966 to 1968. In the 1970s he worked with Loren Schoenberg and Lee Konitz, and in the 1980s with Gerry Mulligan, Grover Mitchell, Benny Carter, and the American Jazz Orchestra. He continued working with Mitchell and Carter into the 1990s, as well as with the legacy orchestras of Buck Clayton and Benny Goodman.