Gilberte Mortier (born 12 March 1907 in Paris, date of death 18 January 1991 in Vielle-Saint-Girons) was a French freestyle swimmer. Mortier competed in the 1924 Summer Olympics. In 1924, she was a member of the French relay team which finished fifth in the 4 x 100 metre freestyle relay competition. In the 400 metre freestyle event, she was eliminated in the first round.