2008-09: Ryan Strome played for the Toronto Marlboro's in the GTHL, with his team going on to win the 2009 OHL Cup. Strome was chosen eighth overall by the Barrie Colts at the 2009 OHL Priority Selection.
2009-10: Strome began his rookie season in the OHL with the Colts, playing in 34 games for that club. He scored 5 goals and added 9 assists for 14 points. Strome was traded from the Colts to the Niagara Ice Dogs in the deal that sent Alex Pietrangelo to Barrie. In 27 games for the Ice Dogs, Strome scored 3 goals and added 10 assists for 13 points. In 5 playoff games for the Ice Dogs, he picked up 3 assists. Strome played for Team Ontario at the 2010 World U-17 Hockey Challenge, scoring 2 goals and adding 1 assist for 3 points in 6 games.
2010-11: Strome played in 65 games for the Niagara Ice Dogs, scoring 33 goals and adding 73 assists for 106 points. He also picked up 82 penalty minutes on the season. His point and assist totals placed him third overall in the OHL in those categories. Strome played for Team Cherry at the 2011 CHL Home Hardware Top Prospects Game.
2011-12: Strome signed a three-year entry-level contract with the Islanders in October 2011 and was with the team out of camp but did not appear in any games before being returned to Niagara for a third OHL season. He also played for Canada at the 2012 U20 World Junior Championship. Strome played 46 games for the IceDogs, missing time due to injury and while he was at the WJC, and scored 30 goals with 38 assists; finishing plus-37 with 47 penalty minutes. Strome was the second-leading scorer for Niagara in the playoffs; scoring 7 goals with 16 assists and was minus-three with a team-high 31 penalty minutes in 20 games as the IceDogs reached the finals against London. Strome was dominant for bronze-medal winning Canada at the WJC, scoring 3 goals with 6 assists and finishing plus-nine in six games.
A slick offensive center who possesses an instinctively gifted skill-set, Strome has excellent hand-skills and a bag full of tricks with the puck on his stick. He has the ability to protect the puck in traffic and is also a very good passer with a playmaker's vision.
Strome has returned to the Niagara IceDogs of the OHL for the 2012-13 season.