2009-10: Chris LeBlanc skated for Winthrop High School in Massachusetts as a sophomore. Winthrop finished 18-3-3 and reached the Division 2 North semifinals.
2010-11: LeBlanc played for Winthrop in his junior season. Winthrop reached the Division 2 North quarterfinals, falling 5-4, to Beverly.
2011-12: LeBlanc was one of two captains for Winthrop in his senior season and was the team's leading scorer. He scored 24 goals with 22 assists in 24 games as Winthrop reached the Division 2 North final against Wilmington.
2012-13: LeBlanc committed to playing college hockey at Merrimack in 2013-14 in September after making a successful impression with the Eastern Junior Hockey League's South Shore Kings during their summer camp. Playiing for the Kings, Leblanc scored 13 goals with 20 assists in 45 games and had 38 penalty minutes. South Shore finished second in the Southern Division but lost to the Valley Warriors in the playoff quarterfinals. LeBlanc had 1 goal in the two games against the Warriors. LeBlanc, who will turn 20 in September 2013, was not among the 210 North American skaters in Central Scouting's final rankings prior to the 2013 NHL Draft. He was selected by Ottawa in the sixth round (161st overall).