Bielak is a surname. Notable people with the surname include:
Brandon Bielak (born 1996), American baseball pitcher (born 1972), Polish lawyer and professor Jacobo Bielak, Mexican-born structural engineer Józef Bielak (1741–1794), Polish-Lithuanian military officer Lukáš Bielák (born 1986), Slovak footballer Piotr Bielak (born 1976), Polish footballer Wiesław Bielak (1943–2022), Polish sculptor
See also
pl:Bielak