John Kenneth Terres (December 17, 1905 – December 8, 2006), was an American naturalist and author. He is best known for his popular works on North American birds. He authored more than fifty works, usually writing as John K. Terres.

He was born in Philadelphia, Pennsylvania and spent his early years in New Jersey. He was educated at State Teachers College (Indiana, Pennsylvania), Cornell University and New York University. In 1986, he received an honorary Doctor of Letters from the University of North Carolina. He received the John Burroughs Medal (1971) for From Laurel Hill to Siler's Bog, which detailed his explorations of Mason Farm Biological Reserve, part of the North Carolina Botanical Garden. Terres served as Editor of Audubon Magazine for twelve years (1948-1960).

He died shortly before his 101st birthday in 2006.