Youngs has played for England U-16, U-18 and in March 2008 was a member of the England under-20 team that won the grand slam. Later that month, Youngs made his debut for the England Sevens team at the Hong Kong sevens. Youngs played in the final of both the 2008 IRB Junior World Championship. and 2009 IRB Junior World Championship. He was selected for the revised England Saxons Squad on 13 January 2010, and upgraded to the revised Senior Squad as injury cover for Harry Ellis on 25 January 2010. Later that month, he made his debut for the England Saxons, against Ireland A.