Helen Lesley Upperton (born October 31, 1979) is a Canadian bobsledder who has competed since 2002. Upperton was born in Ahmadi, Kuwait as her parents involvement in the oil industry meant they traveled abroad. She holds dual citizenship of both Great Britain and Canada. Upperton won the silver medal at the 2010 Winter Olympics after previously finishing fourth in the two-woman event at the 2006 Winter Olympics in Turin. She went to high school at Dr. E.P. Scarlett High School
Upperton also competed in the FIBT World Championships, earning her best finish of fourth in the two-woman event at Altenberg in 2008. Her best overall Bobsleigh World Cup finish was second in the two-woman event in the 2005-06 season.
A former triple jumper at the University of Texas at Austin, Upperton moved to bobsleigh in 2002. In the 2005-06 season she won four medals on the World Cup including a gold at an event in St. Moritz, Switzerland, Canada's first women's World Cup win in bobsleigh. One month later she finished fourth in the two-woman event at the 2006 Winter Olympics. Upperton scored a total of six wins and over 20 podium finishes in World Cup competition.
She won a silver medal in the Two-woman competition at the 2010 Winter Olympics with Shelley-Ann Brown. The gold medal was won by fellow Canadians Kaillie Humphries and Heather Moyse. It marked the first time of the 2010 Olympics that Canadians had won two medals in one event.
Upperton and Brown announced their retirements from the sport in September 2012. After retiring Upperton became manager of community relations with WinSport Canada. Subsequently she became head coach of WinSport Academy's bobsleigh programme, training developing bobsledders.
Upperton was CBC's analyst for men's and women's bobsleigh and skeleton at the 2014 Winter Olympics, with Mark Connolly as commentator.