Nikolai Nikolaeff (born 26 December 1981) is an Australian actor who is best known for his roles in the television series Sea Patrol, Power Rangers Jungle Fury and Daredevil.

Nikolaeff was born in Melbourne, and is of Russian and Ukrainian descent. He began acting at the age of twelve and enrolled into the Victorian Youth Theatre. He attended school at Caulfield Grammar School and at sixteen, Nikolaeff landed a lead role in Crash Zone which led to a number of roles in other children's television series. He took an Arts degree at Monash University in Caulfield.