Kubiak is a Polish surname. Notable people with the surname include:
Clifford Kubiak (born 1953), American biochemist Dan Kubiak (1938–1998), Texas politician Gary Kubiak (born 1961), American football coach Jim Kubiak (born 1972), American football coach Katie Kubiak (born 2003), American Paralympic swimmer Klay Kubiak (born 1988), American football coach Klein Kubiak (born 1991), American football executive Klint Kubiak (born 1987), American football coach Marcin Kubiak (born 1969), Polish diplomat Marcin Kubiak (astronomer), Polish astrophysicist Michał Kubiak (born 1988), Polish volleyball player Ryszard Kubiak (1950–2022), Polish rower Ted Kubiak (born 1942), American baseball player Teresa Kubiak (born 1937), Polish operatic soprano Zygmunt Kubiak (1929–2004), Polish writer
See also Jakubiak, similar Polish surname