Musielak is a Polish surname. Notable people with the surname include:
Andreas Musielak, chief operating officer of DENIC, a German domain management cooperative Dora Musielak, Mexican-American aerospace engineer, historian of mathematics, and book author Rafał Musielak, player in the winning team of the 2000–01 Polish Volleyball League Ryszard Musielak (born 1950), Polish labor union leader and anti-communist activist Sebastian Musielak, Polish translator of Finnish fantasy novel Not Before Sundown Sławomir Musielak (born 1990), Polish motorcyclist Stephen Musielak, former pastor at Our Lady of Czestochowa Parish, Boston Tobiasz Musielak (born 1993), Polish motorcyclist Walenty Musielak (1913–1977), Polish footballer