Both Sinclair and LeBlanc, who have more than 100 appearances each for the Canadian women's national team, were among 14 members selected by coach John Herdman that also won the 2010 CONCACAF women's championship in Cancun, Mexico.
Canada will open the London Games against reigning Women's World Cup champion Japan on July 25 in Coventry , England, face South Africa three days later in the same city before finishing the group stage against Sweden in Newcastle.
Canadian Women Olympic Roster
Goalkeepers: Karina LeBlanc, Erin McLeod
Defenders: Candace Chapman, Carmelina Moscato, Emily Zurrer, Robyn Gayle, Lauren Sesselmann, Chelsea Stewart, Rhian Wilkinson.
Midfielders: Kaylyn Kyle, Diana Matheson, Kelly Parker, Sophie Schmidt, Desiree Scott.
Forwards: Jonelle Filigno, Christine Sinclair, Melissa Tancredi, Brittany Timko.