John Mark Heard III (December 16, 1951 – August 16, 1992) was an American record producer, folk rock singer and songwriter from Macon, Georgia.

Heard released sixteen albums, and produced or performed with many artists, including: Sam Phillips (aka Leslie Phillips), Pierce Pettis, Phil Keaggy, Vigilantes of Love, Peter Buck of R.E.M. (who co-produced VOL's album Killing Floor with Heard), The Choir, Randy Stonehill and Michael Been of The Call. Heard produced part of Olivia Newton-John's The Rumour (1988), which also included a cover of Heard's own "Big and Strong" (originally called "How to Grow Up Big and Strong").

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