Kozak or Kozák is a Slavic surname literally meaning "Cossack". Notable people with the surname or name include:

• Amanda Kozak (born 1984), American beauty pageant winner
• Anna Kozak (born 1974), Belarusian sprinter
• Artem Kozak (born 1998), Ukrainian footballer
• Ashley Kozak, British jazz bassist, record producer and artists' manager
• Danuta Kozák (born 1987), Hungarian sprint canoer
• David Kozák (1999-2023), Czech mass murderer
• Dmitry Kozak (born 1958), Russian politician
• Don Kozak (born 1952), Canadian former professional ice hockey forward
• Ferdo Kozak (1894-1957), Slovenian author, playwright, editor and politician
• Harley Jane Kozak (born 1957), American actress and author
• Heidi Kozak (born 1963), American actress
• Ivan Kozák (born 1970), Slovak footballer
• Ján Kozák, multiple people
• Juš Kozak (1892-1964), Slovenian writer, playwright and editor
• Les Kozak (born 1940), Canadian former ice hockey player
• Libor Kozák (born 1989), Czech footballer
• Lukáš Kozák, Slovak ice hockey player
• Magdalena Kozak (born 1988), Polish chess master
• Marilyn Kozak, American microbiologist
• Miroslav Kozák, Slovak footballer
• Mykhaylo Kozak (born 1991), Ukrainian footballer
• Oleksandr Kozak (born 1994), Ukrainian footballer
• Petr Kozák (born 1965), Czech orienteering competitor
• Petro Kozak (1911–1984), Ukrainian clandestine Greek-Catholic hierarch, auxiliary bishop of Lviv (1983–1984)
• Primož Kozak (1929-1981), Slovenian playwright and essayist
• Rachael Kozak, Female electronic musician and Black Metal lyricist
• Richard Kozak (born 1949), Canadian politician in Manitoba, Canada
• Roman Mykolayovych Kozak (born 1957), Ukrainian politician, candidate in the 2004 Ukrainian presidential election
• Roman Yefimovich Kozak (1957-2010), Russian theatre actor and director
• Semyon Kozak (1902-1953), Soviet general
• Scott Kozak (born 1965), American football linebacker
• Syarhey Kozak (born 1981), Belarusian footballer
• Václav Kozák (1937-2004), Czech rower
• Warren Kozak (born 1951), American writer and journalist
• Wojciech Kozak (born 1963), Polish politician
• Zbigniew Kozak (born 1961), Polish politician

• All pages with titles containing Kozak
• Kazak (surname)
• Kozakov or Kozákov
• Kazakov
• Cossack (disambiguation)
• Kossak