Marta Xargay Casademont (born 20 December 1990) is a Spanish professional basketball player. She played for Phoenix Mercury of the WNBA, and currently for the Spanish team Uni Girona CB and the Spain women's national basketball team. She has represented national team since EuroBasket Women 2011 competition. She won EuroLeague Women 2010–11 with Perfumerías Avenida Baloncesto. She left Spain in 2015, joining both USK Praha of the Czech League in 2015 and the Phoenix Mercury of the WNBA on 11 February 2015. In September 2018 she signed for Dynamo Kursk of the Russian Premier League., and in January 2020 she returned to her youth club Uni Girona CB.