Mars Di Bartolomeo (born 27 June 1952) is a Luxembourgish politician of the Luxembourg Socialist Workers' Party (LSAP) who served as President of the Chamber of Deputies from 2013 to 2018.
After attending the lycée in Esch-sur-Alzette, he worked for the Tageblatt newspaper from 1972 until 1984.
He became parliamentary secretary for the Luxembourg Socialist Workers' Party in 1984. In 1987, Di Bartolomeo became a local councillor, and in 1989 was elected to the Chamber of Deputies. On 1 January 1994, Di Bartolomeo became Mayor of Dudelange. In 2004, he entered the cabinet as Minister of Health and Social Security.
Following the 2009 general election, Di Bartolomeo kept his posts as Minister of Social Security and Minister of Health, when the Christian Social Party (CSV) and the Luxembourg Socialist Workersâ Party (LSAP) formed a coalition government.