The 21st AVN Awards ceremony, presented by Adult Video News (AVN), took place January 10, 2004 at the Venetian Hotel Grand Ballroom, at Paradise, Nevada, U.S.A. During the ceremony, AVN presented AVN Awards in 94 categories honoring the best pornographic films released between Oct. 1, 2002 and Sept. 30, 2003. The ceremony, televised in the United States by Playboy TV, was produced and directed by Gary Miller. Comedian Jim Norton hosted the show for the first time with adult film star Jenna Jameson in her third stint as co-host.

The AVN Awards are film awards sponsored and presented by the American adult video industry trade magazine AVN to recognize achievement in various aspects of the creation and marketing of American pornographic films. They are often called the "Oscars of porn".