Back Da-yeon (born 24 January 2002) is a Korean tennis player. Back has a career-high singles ranking of 580 by the Women's Tennis Association (WTA), achieved on 7 October 2022. She also has a career-high WTA doubles ranking of 563, reached on 14 October 2022. Back made her WTA Tour debut at the 2022 Korea Open after qualifying for the singles main draw.