Jackson made the Australian under-20 team when she was only 14 years old and was first called up to the Australian Women's National Basketball Team (nicknamed The Opals) when she was 16 years old. She was a member of the 2000 Summer Olympics and 2004 Summer Olympics teams and captain of the 2008 Summer Olympics team, winning three silver medals. She was also part of the Australian team that won the bronze at the 2012 Summer Olympics. Jackson was a member of the Australian Senior Women's Team that won a silver medal at the 2002 FIBA World Championship for Women in China, co-captain of the team that won a gold medal at the 2006 Commonwealth Games in Melbourne, and captain of the team that won a gold medal at the 2006 FIBA World Championship for Women in Brazil.