2010-11: Ryan Hitchcock skated for the Long Island Gulls midget minor team in New York. In 27 games he scored 30 goals with 28 assists and had 28 penalty minutes. Hitchcock was invited to USA Hockey's Select 14 Player Development Camp.
2011-12: Hitchcock joined the New Jersey Rockets — playing three games with the Tier 1 Atlantic Junior Hockey League team — spending most of the year with the Metropolitan League team. He scored 2 goals with 1 assist for the AJHL team and had 19 goals with 29 assists and 26 penalty minutes in 24 Met League games. Hitchcock was invited to USA Hockey's National Team Development Camp and was invited to join the program in 2012-13. in September 2011 Hitchcock committed to playing college hockey at Yale in 2014-15. He was selected by Brampton in the 10th round (197th overall) of the 2012 OHL Priority Draft.
2012-13: Hitchcock played two games for the NTDP's U18 team and was the third-leading scorer for the program's U17 squad in his first season in Ann Arbor. He skated for the USA's bronze medal-winning U17 team at the 2013 World Hockey Challenge in Canada. Hitchcock had 1 assist with the U18 team and scored 14 goals with 18 assists and had 14 penalty minutes in 54 games with the NTDP U17 squad. After scoring 1 goal in four games at the 2012 Four Nations Tournament in Switzerland he had 2 goals with 4 assists in six games at the 2013 WHC in Quebec. He played for the USA in the 2013 Five Nations Tournament in Finland, where the USA finished third, and had 2 goals with 4 assists in six games.
2013-14: Hitchcock returned to Ann Arbor for his second season with the USA NTDP. In 41 games for the U18 team he scored 8 goals with 30 assists and had 8 penalty minutes. Hitchcock played in the 2013 USA Hockey/CCCM All-American Prospects game and was ranked 95th amongst North American skaters in Central Scouting's mid-term rankings prior to the 2014 NHL Draft.