Marta Domachowska (born 16 January 1986 in Warsaw) is a retired Polish professional tennis player ranked World No. 37 in singles (2006) and World No. 62 in doubles (2006). She reached 2008 Australian Open fourth round in singles and won 2006 Canberra International in doubles with Roberta Vinci. She also reached three WTA Tour singles finals at 2004 Hansol Korea Open (lost to Maria Sharapova), 2005 Internationaux de Strasbourg (lost to Anabel Medina Garrigues) and 2006 U.S. National Indoor Tennis Championships (lost to Sofia Arvidsson). She was 2003 Australian Open finalist in girls' singles, represented Poland at the 2008 Summer Olympics and was member of Poland Fed Cup team. Domachowska was the best female Polish tennis player after Magdalena Grzybowska's retirement and before Agnieszka Radwańska's successes.