Diel (disambiguation)

Diel vertical migration is a pattern of movement used by some organisms living in oceans and lakes.

Diel may also refer to:

People with the surname Diel

 * Adrian Diel (1756–1839), German physician and founder of pomology
 * Paul Diel (1893–1972), French psychologist
 * Charles Diel, former head men's tennis coach, 1933-1942, for Louisiana State University Tigers