Mary Spencer (born December 12, 1984) is a Canadian boxer who currently competes as a 75 kilogram middleweight. She has won three World Championships, one Pan American Games gold medal, and eight Canadian Championships. Spencer's athletic career started early competing in multiple sports as a child including; Basketball, Volleyball, Soccer, and Track and field. Spencer began serious boxing training in 2002 and now trains at the Windsor Amateur Boxing Club under Coach Charlie Stewart. As of July 26, 2011, her amateur record is 115 wins, 9 losses. Spencer was born in Wiarton, Ontario and currently lives in Windsor, Ontario. She is a member of the Chippewas of Nawash Unceded First Nation.
|Height||1.8 m (5 ft 11 in)|
|Born||12 December 1984|
Wiarton, Ontario, Canada
|Wins by KO||8|
Women's boxing was a part of the Olympic Games program for the first time in London in 2012. Spencer obtained an endorsement deal with CoverGirl. The company has donated more than $140,000 to support her in her quest for gold in London 2012 Summer Olympics  Spencer was considered a medal favourite, and one of Canada's best hopes in women's boxing. She reached the quarterfinals, where she lost to China's Li Jinzi. She was a Indspire Award recipient in the sports category in 2014.
- Williams, Cheryl. "Mary Spencer". The Canadian Encyclopedia. Retrieved 2017-03-23.
- "Mary Spencer". Official Canadian Olympic Team Website | Team Canada | 2016 Olympic Games. 2011-10-25. Retrieved 2017-03-23.
- Christie, James (2011-07-26). "Going all-in in the Ring". The Globe and Mail. Retrieved 2011-07-28.
- "Writers-in-Residence Program: Robin Kimmerer." Archived 2013-04-02 at the Wayback Machine HJ Andrews Experimental Forest. 2004. Retrieved 17 July 2012.
- "How boxer Mary Spencer, once an Olympic covergirl, found herself on the outside looking in ahead of 2015 Pan Am Games". National Post. Retrieved 2017-03-23.
- Bell, Jamie (2011-07-27). "A look at some of Canada's top female medal threats for 2012". The Sports Network. Retrieved 2011-07-28.
- "Mary Spencer Bio, Stats, and Results". Olympics at Sports-Reference.com. Retrieved 2015-09-15.
- Mary Spencer at womenboxing.com