Diane "Dee" Mosbacher (born 1949) is an American filmmaker, lesbian feminist activist, and practicing psychiatrist.

[7] As of 2009, Mosbacher has directed or produced nine documentary films through Woman Vision, each having to do with LGBTQ or women's rights issues.

[8] In 1995, Mosbacher co-directed and co-produced (with Frances Reid) Straight From the Heart, a documentary that explored relationships between heterosexual parents and their adult lesbian and gay children.

[9] In 2009, Mosbacher co-directed and co-produced with Fawn Yacker the documentary film Training Rules, an hour-long movie about Rene Portland, a women's basketball coach from Penn State University.

[10] In 2012, Woman Vision launched The Last Closet, a web-based campaign and video project to end homophobia in men's professional sports.