Campbell has represented the Republic of Ireland at U-17, U-19 and senior level. In 2010, together with Ciara Grant , Dora Gorman, Denise O'Sullivan, Siobhán Killeen and Clare Shine, she was a member of the Republic of Ireland U-17 squad that were runners-up in the 2010 UEFA Women's Under-17 Championship and quarter-finalists in the 2010 FIFA U-17 Women's World Cup. In the UEFA championship, Campbell scored twice: the winner in 2–1 group victory against Sweden and the semi-final goal in the 1–0 win over Germany. In the World Cup, Campbell scored the opening goal in a 3–0 win against Ghana.