The individual who has won the most Oscars is Walt Disney. He holds the record with 22 competitive Academy Awards and was also awarded four special or honorary Academy Awards, making his total Oscar count 26. Walt Disney is far ahead of others in this regard.
For context, in acting categories, Katharine Hepburn holds the record for the most Oscars won by an actor or actress, with a total of four Oscars.
Thus, Walt Disney is the all-time leader in Oscar wins.