Marta Semelová (born 1 March 1960) is a Czech politician who served as a member of the Chamber of Deputies (MP) from 2010 to 2017, representing the Communist Party of Bohemia and Moravia.
Before that, she had worked as a teacher of the first stage of primary school, chair of the Communist Party group of the Assembly of the City of Prague, and chair of the Prague council of the Communist Party.