Martha McCarthy is a Canadian lawyer who specializes in LGBT issues of family law. McCarthy is best known as the counsel for M. in the landmark Supreme Court of Canada case, M. v. H. which established equal rights for same-sex couples in Canada. In 2007, McCarthy received the Excellence in Family Law award from the Ontario Bar Association.
- Alderson, Kevin; Lahey, Kathleen A. (May 2004). Same-Sex Marriage: The Personal and the Political. Insomniac Press. pp. 80–81. ISBN 1-894663-63-2.
- "Martha McCarthy to Receive OBA Award for Excellence in Family Law". Ontario Bar Association. May 17, 2007. Archived from the original on March 15, 2011. Retrieved 2011-03-23.