In June 2012, Stoney was named in the 18-player Great Britain squad formed for the 2012 London Olympics. The group was selected by England manager Hope Powell and comprised 16 English players plus Scots Kim Little and Ifeoma Dieke. Stoney was confirmed in her role as captain. Stoney scored in the team's second group stage match, a 3–0 win over Cameroon. After winning all three matches and finishing at the top of the table for Group E, Great Britain advanced to the quarter finals where they faced Canada in front of 28,828 spectators at City of Coventry Stadium. Stoney was disappointed when Great Britain lost 2–0 and were knocked out. She argued for the continued participation of Great Britain at future Olympic football tournaments. England's third-place finish at the 2015 FIFA Women's World Cup secured Great Britain's qualification for the 2016 Rio Olympics, but the team were blocked from competing due to political infighting among the "Home Nations". A 2016 UEFA Women's Olympic Qualifying Tournament was convened instead.