Masłowski (feminine: Masłowska) or Maslowski is a Polish and Ashkenazic toponymic surname, referring to someone from any of numerous places named Masłowo, Masłowice or Masłów. Notable people with the surname include:
Bolesław Masłowski (1851–1928), Polish chemist Dorota Masłowska (born 1983), Polish writer, playwright, columnist and journalist Gabriela Masłowska (born 1950), Polish politician Maciej Masłowski (1901–1976), Polish art historian Mateusz Masłowski (born 1997), Polish volleyball player Matt Maslowski (born 1949), American football player Michał Masłowski (born 1989), Polish footballer Mike Maslowski (born 1974), American football player Mirosława Masłowska (1943–2023), Polish politician and surgeon Piotr Masłowski (born 1988), Polish handball player Stanisław Masłowski (1853–1926), Polish painter Wiesław Masłowski, Polish-American research professor Władysław Masłowski (1933–1986), Polish journalist and press researcher