Jack Nicholson, with 12.
Jack Nicholson has the most oscar nominations with 12. He has picked up 3 oscars for a Few Good Men, Terms of Endearment and One Flew Over the Cuckoos Nest.
Has been nominated for an acting Oscar in five different decades (1960s, 1970s, 1980s, 1990s and 2000s).
Is one of only a few actors to win a Best Supporting Actor Oscar after winning a Best Actor Oscar.
Nicholson has been nominated for a Razzie Award as Worst Actor twice, for his performances in Man Trouble (1992) and Hoffa (1992) but he should have won an oscar for his role in A Few Good Men.