Academy Award for Best Director

The Academy Award for Best Directing (Best Director), usually known as the Best Director Oscar, is one of the Awards of Merit presented by the Academy of Motion Picture Arts and Sciences (AMPAS). It is given to directors for a movie.
Nominations for Best Director are made by members in the academy's Directing branch. The award winners are selected by the academy membership as a whole.
Winners and nominees
1920s
In the first year only, the award was separated into Dramatic Direction and Comedy Direction.
1930s
1940s
1950s
1960s
1970s
1980s
1990s
2000s
2010s
International presence
As the Academy Awards are based in the United States and are centered on the Hollywood film industry, the majority of Academy Award winners have been Americans. Nonetheless, there is significant international presence at the awards, as evidenced by the following list of winners of the Academy Award for Best Director.
Australia: Mel Gibson, Tom Hooper (Gibson, a U.S. citizen, moved with his family to Australia at the age of 12. Hooper, born in the U.K., is a dual citizen of Australia and the United Kingdom as his mother was born in Australia.)
Austria: Billy Wilder, Fred Zinnemann (Both Wilder and Zinnemann moved to America in their twenties and became naturalized U.S. citizens.)
Canada: James Cameron (Cameron was applying to become a U.S. citizen.)
Czech Republic: Milos Forman (naturalized U.S. citizen since 1977)
France: Michel Hazanavicius
Germany: William Wyler, Mike Nichols (After moving to America in 1921, Wyler became a naturalized U.S. citizen in his twenties. Wyler was born in Alsace which was part of the German Empire then, but now is part of France. Nichols' family moved from Germany when he was eight-years old, and he became a naturalized U.S. citizen five years later.)
Italy: Bernardo Bertolucci
New Zealand: Peter Jackson
Poland: Roman Polanski (French citizenship)
Taiwan: Ang Lee (naturalized U.S. citizen who has lived in America since the early 1980s.)
United Kingdom: Richard Attenborough, Danny Boyle, David Lean, Sam Mendes, Anthony Minghella, Carol Reed, Tony Richardson, John Schlesinger, and Tom Hooper
However, no director has won for a film that is entirely in a foreign language.
There have been 20 directors nominated for films entirely or significantly in a foreign (non-English) language.
Federico Fellini (nominated for 4 films, which were all in Italian)
Ingmar Bergman (nominated for 3 films, which were all in Swedish)
Pietro Germi (Italian)
Hiroshi Teshigahara (Japanese)
Claude Lelouch (French)
Gillo Pontecorvo (Italian-born director nominated for The Battle of Algiers, which was in French and Arabic)
Costa Gavras (Greek-born director nominated for French-language film Z.)
Jan Troell (Swedish)
Francois Truffaut (French)
Lina Wertmuller (Italian)
Edouard Molinaro (French)
Wolfgang Petersen (German)
Akira Kurosawa (Japanese)
Lasse Hallstrom (Swedish. He was also nominated for the English-language film The Cider House Rules.)
Krzysztof Kieslowski (Polish-born director nominated for French-language film Three Colours: Red)
Michael Radford (an English-born director nominated for the Italian-language film Il Postino.)
Roberto Benigni (Italian)
Ang Lee (Taiwanese-born director nominated for the Mandarin-language film Crouching Tiger, Hidden Dragon. He would later win for the English-language film Brokeback Mountain.)
Pedro Almodovar (Spanish)
Fernando Meirelles (Brazilian Portuguese)
Clint Eastwood (an American director nominated for the Japanese-language film Letters from Iwo Jima, which has a few brief scenes in English).
Julian Schnabel (an American director nominated for the French-language film The Diving Bell and the Butterfly.)
Ironically, internationally known filmmakers Jean Renoir (for The Southerner), Michelangelo Antonioni (for Blowup) and Louis Malle (for Atlantic City) were nominated for films that were in English and not their native language.