Leonard Peter "Len" Vlahov (29 June 1940 – 24 February 1997) was an Australian track and field athlete who specialised in the discus.

He was the national champion in 1969 and 1975, and represented Australia at the 1962 British Empire and Commonwealth Games and the 1967 Summer Universiade.

[1] Between 1960 and 1975, Vlahov medalled for Western Australia in thirteen editions of the Australian Open Track and Field Championships.

[2] At the 1962 British Empire and Commonwealth Games, hosted in Perth, Vlahov was one of four Australians selected to compete in the men's discus event.

He placed sixth overall with a throw of 158 feet 5 inches (48.29 m), and was the second-best Australian behind gold medallist Warwick Selvey.