Mildred (Millie) Deegan (December 11 1919 – July 21 2002) was a professional Major League Baseball player.
She played pitcher and second base in the All-American Girls Professional Baseball League from 1943 until 1952. She played for the Rockford Peaches and the Kenosha Comets.
- Associated Press. "Mildred Deegan: The 'Babe Ruth of women' was star of war-time league", The Globe and Mail, July 26, 2002, p. R11.