Černák, feminine: Černáková, is a Slovak surname that may refer to:
- Alena Černáková (born 1961), Czechoslovak gymnast
- Erik Černák (born 1997), Slovak ice hockey defenseman
- Ibolja Cernak, Serbian medical scientist
- Isaka Cernak (born 1989), Australian football player
- Ľudovít Černák (born 1951), Slovak politician and businessman
- Michal Černák (born 2003), Czech footballer
- Peter Černák (born 1976), Slovak football player
- Roland Černák (born 1997), Slovak football midfielder