Kronwall represented Sweden at the 2006 Winter Olympics in Turin, where he recorded one goal and one assist in two games, and won a gold medal. That same year, Kronwall represented Sweden at the 2006 IIHF World Championship, where he was the leading scorer for Sweden, recording two goals and eight assists in eight games and won a gold medal. Sweden became the first team in hockey history to win the Olympic gold and the World Championship in the same year.