Knapik is a Polish surname. Notable people with the name include:
Eugeniusz Knapik (born 1951), Polish pianist and composer of classical music Frantisek Knapik (born 1956), the mayor of the Slovak city of Košice Michael Knapik (born 1963), American politician Renata Knapik-Miazga (born 1988), Polish épée fencer Robert Knapik (born 1970), aka Robbie Rage, American professional wrestler Tomasz Knapik (1943–2021), Polish film, radio and TV voice-over translation artist Wojciech Knapik (born 1980), Polish sport shooter