Andersson is the all-time junior international games played leader for Sweden. He has played in four major international tournaments, his first being the 2006 IIHF World U18 Championships. The following year Andersson helped Sweden win a bronze medal at the 2007 IIHF World U18 Championships. At the 2008 World Junior Ice Hockey Championships Andersson helped Sweden to a silver medal, with six assists in six games he was tied for third in the tournament assist leaders.