2010-11: Austin Poganski played for the varsity team at Minnesota's St. Cloud Cathedral HS as a freshman. He scored 22 goals with 16 assists in 27 games and was +15 with 6 penalty minutes. The Crusaders lost to state runner-up Hermantown in the Section 6A semifinals.
2011-12: Poganski was the second-leading scorer for St. Cloud Cathedral as a sophomore and was invited to USA Hockey's Select 16 Development Camp. He scored 24 goals with 28 assists in 27 games and had 6 penalty minutes. The Crusaders reached the Section 6A semifinals; falling to Rogers, 3-1.
2012-13: Poganski made his USHL debut with Tri-City after skating for Great Plains in the Upper Midwest Elite League in the fall and then finishing his junior season at St. Cloud Cathedral. He also skated in 11 games with the USA NTDP's U17 team and represented the USA at the 2012 U17 Five Nations Tournament in the Czech Republic in the summer and played in the 2013 U17 World Hockey Challenge. He scored 1 goal with 1 assist and was +2 in two USHL games. Poganski scored 10 games with 14 assists in 22 games for Team Great Plains. In nine high school games he scored 13 goals with 8 assists and 8 penalty minutes. Poganski had 4 goals with 1 assist in four games at the Five Nations Tournament and had 7 goals and 2 penalty minutes during the regular season with the NTDP U17 squad and led the bronze medal-winning USA squad with 6 goals in six games at the WHC. In December 2012 he committed to playing college hockey at North Dakota in 2014-15.
2013-14: Poganski played with the USA U18 team at the 2013 Ivan Hlinka Memorial Tournament before returning to Tri-City for his first full USHL season. He was selected for the 2013 CCM/USA Hockey All-American Prospects Game in September and played for the USA in the 2013 U19 World Junior A Challenge. Poganski had 2 assists and was -2 with 4 penalty minutes in five games at the Ivan Hlinka Tournament and had 1 assist in four games as the USA captured the gold medal at the WJAC.