2009-10: Adam Johnson skated in 27 games for Hibbing/Chisholm in the Minnesota public high school league as a freshman. He scored 9 goals with 16 assists and was plus-12 with 8 penalty minutes. Hibbing fell to Virginia/Mountain Iron-Buhl in the Section A Final.
2010-11: Johnson scored 42 goals with 43 assists and was plus-18 in 31 games for Hibbing/Chisholm as a sophomore. The Bluejackets captured the Section 7A title to reach the Minnesota state tournament. Johnson committed to playing college hockey at Minnesota-Duluth in 2013-14. He was selected by the USHL's Indiana Ice in the second round (16th overall) of the 2011 USHL Entry Draft.
2011-12: Johnson was the leading scorer for Hibbing/Chisholm as a junior. In 23 games he scored 28 goals with 31 assists and 20 penalty minutes. Hibbing/Chisholm reached the Section 7A finals, falling to Duluth Marshall. Johnson competed in the Iron Range-Duluth Area All-Star game in March. He was ranked 82nd amongst North American skaters in Central Scouting's final rankings prior to the 2012 NHL Draft.
2012-13: Johnson skated for Team North in the Upper Midwest Elite High School League in the fall before returning to HIbbing/Chisholm for his senior season. Johnson scored 7 goals with 8 assists in 24 games for Team North. Johnson was the leading scorer for Hibbing/Chisholm despite playing defense much of the year, finishing with 20 goals and 27 assists in 26 games with 70 penalty minutes. The Bluejackets lost to Section 7A champion Duluth Marshall in the sectional semifinals. Johnson was a finalist for Minnesota high school hockey's Mr. Hockey Award.
Johnson is one of the better offensive talents coming out of the Minnesota High School system for the 2013 NHL Draft. He has elite speed, agility and skating ability and has a nose for scoring. A former defenseman, he is certainly responsible in his own end but, at 5’10” and 150 pounds, the biggest question mark with Johnson is his strength. Over the last year, he has committed to bulking up to be able to compete at the next level, but only time will tell whether or not the work he put in was enough.