Delphine Lansac (born 18 July 1995) is a French badminton player. She participated in the 2015 BWF World Championships in women's singles and women's doubles (with Émilie Lefel). In 2016, she competed at the Summer Olympic Games held in Rio de Janeiro, Brazil, and did not advance to the final stage. In the group stage, she was defeated by Liang Xiaoyu 21-7-21-15, and by Sung Ji-hyun 21-13, 21-14.