Marjorie Carroll is a former nurse and politician in Ontario, Canada. She served as the first female mayor of Waterloo from 1978 to 1988.
She grew up on a farm near Elmwood, Ontario. She was educated at the Kitchener-Waterloo School of Nursing and studied public health nursing at the University of Western Ontario. She worked as a nurse in Toronto, where she met her husband, Glenn Carroll. Carroll worked on campaigns for the federal and provincial Progressive Conservatives. She was elected to Waterloo city council in 1974. She was elected mayor by the council after Herb Epp resigned to enter provincial politics. She was reelected by acclamation three more times. Carroll lost to Brian Turnbull when she ran for reelection in 1988.
She served as chair of the KW Hospital Foundation from 1989 until 1992. In 2004, the birthing centre at the Grand River Hospital was renamed the Marjorie Carroll Childbirth Centre. A nursing lecture hall at Conestoga College was also named in her honour.