Sampson has represented England at Under-17 and Under-19 level. Her debut for England U17s came on 13 April 2012 in a home defeat to Iceland in a 2012 UEFA Women's Under-17 Championship qualifier. She made four further appearances throughout 2014 for England U17s and scored one goal; versus Israel in qualifying for the 2013 UEFA Women's Under-17 Championship. In 2013, Sampson made the move into the England U19s and made her debut on 4 April against Serbia. Another qualifying appearance came before she was selected by England for the 2014 UEFA Women's Under-19 Championship, she played the full minutes in her nation's opening two games before missing the third and final game as England were knocked out at the group stage.