Most Oscars won in a year - individual
Who
Walter (Walt) Elias Disney
What
4 total number
Where
United States (Los Angeles)
When
1953

Walt Disney (USA) won the most Oscars at a single presentation with four in 1953 for Best Cartoon: Toot, Whistle, Plunk and Boom; Best Documentary Short: The Alaskan Eskimo; Best Documentary Feature: The Living Desert and Best Two-Reel Short: Bear Country.