Masar (Slovak/Czech: Masár, Masař; feminine: Masárová, Masařová) are occupational surnames meaning butcher in some Slavic languages. Notable people with the surname include:

Dušan Masár (born 1962), Czech wrestler Ella Masar (born 1986), American-Canadian soccer player Felix Masár (born 1955), Czechoslovak canoeist Rebeka Masarova (born 1999) Spanish tennis player Vladimír Masár (born 1958), Slovak economist

See also