Ondi Doane Timoner (born December 6, 1972) is an American documentary filmmaker and the founder and chief executive officer of Interloper Films, a production company located in Pasadena, California.

Timoner is a two-time recipient of the Sundance Film Festival's Grand Jury Prize for her documentaries Dig! (2004) and We Live in Public (2009). Both films were acquired by New York's Museum of Modern Art for their permanent collection. Her 2023 film, Last Flight Home was nominated for an Emmy and Academy Award. Timoner is a member of the Academy of Motion Picture Arts & Sciences, the DGA, the PGA, the International Documentary Association, Film Fatales, and Women in Film.