Henrik Djernis (born 22 April 1968) is a Danish cyclist. He competed in cyclo-cross, mountain bike and road racing. He was the first man to win the World Mountain Bike Championship three times, which he did in 1992 (in Bromont, QC, Canada), 1993 (in Métabief, France), and 1994 (in Vail, CO, United States). Djernis won the Danish Cyclocross National Championship ten times in a row from 1989 to 1998 and then won the title twice more in 2000 and 2001.