Julia Sebastián (born 23 November 1993)[2] is an Argentine breaststroke swimmer.

She represented Argentina at the 2020 Summer Olympics in the women's 100 metre breaststroke event and the women's 200 metre breaststroke event.

[3][4] She won a gold and a silver medal at the 2014 South American Games.

[5] She competed at the 2019 Maria Lenk Trophy in Brazil, setting a South American record, in 200-meter breaststroke .

[6] This biographical article related to an Argentine swimmer is a stub.