Mimi Stewart (born January 27, 1947) is an American politician serving as a member of the New Mexico Senate, representing District 17 since December 2014. She was appointed to replace Tim Keller, who was elected to state auditor. Stewart previously served in the New Mexico House of Representatives, representing district 21 from January 1995 until her appointment to the Senate.

Stewart earned a Bachelor of Arts degree from Boston University and Bachelor of Science from Wheelock College. She took additional graduate courses at the University of New Mexico.