Diana Beverly Matheson (born April 6, 1984) is a Canadian international soccer player. She represents Canada on the Canada women's national soccer team and currently plays for Utah Royals FC in the National Women's Soccer League (NWSL). She previously played for the Washington Spirit in the NWSL and Team Strømmen in the Toppserien, the top division league in Norway. She is best known for scoring the bronze medal-winning goal for Canada in the 92nd minute against France at the 2012 Summer Olympics. She also won a bronze medal at the 2016 Rio Olympics and gold medal at the 2011 Pan American Games with the senior national team.
Born in Mississauga, Ontario, Matheson attended White Oaks Secondary School in Oakville, Ontario, where she received Principal's Award for athletics and academics. As a member of the Ontario provincial team from 1999 to 2002, she won the national championship in 2001 and was runner-up in 2002. She was captain of the team in 2002. Playing for the Oakville Women's team, Matheson was a 2002 Ontario Cup champion and club national women's champion.