Another of the biggest films of 2023, Greta Gerwig's "Barbie," was close behind with eight Oscar nominations.
Both films were nominated for best picture.
The other nominees in the category were "American Fiction," "Anatomy of a Fall," "The Holdovers," "Killers of the Flower Moon," "Maestro," "Past Lives," "Poor Things" and "The Zone of Interest."
'Barbenheimer' sweeps acting categories nominations
Among the nominees for best actor were Cillian Murphy in "Oppenheimer" and Bradley Cooper in "Maestro."
"Barbie" cast members America Ferrera and Ryan Gosling were nominated for best supporting actress and best supporting actor, respectively.
Emily Blunt and Robert Downey Jr. were also nominated in the same two categories for their performances in "Oppenheimer."
German thriller nabs international nomination
German film "Das Lehrerzimmer" (The Teachers' Lounge) by director Ilker Catak was nominated for best international film.
It is up against Japan's Oscar entry "Perfect Days," which was directed by German filmmaker Wim Wenders, as well as the Italian film "Io Capitano" and "Zone of Interest" from the United Kingdom.
"20 Days in Mariupol," which chronicles the first three weeks of the Russian invasion, was nominated for best documentary film.
Co-produced by The Associated Press, it is the news organization's first Oscar nomination in its 178-year history.