Janek is a given name. Notable people with the name include:
Given name:
Janek Gwizdala (born 1978), English jazz bassist and record producer
Janek Juzek (born 1892), Czech exporter of orchestral string instruments bearing his Anglican name, John Juzek
Janek Kiisman (born 1972), retired association football defender from Estonia
Janek Meet (born 1974), former Estonian footballer
Janek Mela (born 1988), Polish explorer, teenage double amputee, youngest person to reach the North Pole
Janek Pawel Pietrzak (1984–2008), United States Marine Corps Sergeant murdered in 2008
Janek Ratnatunga, Sri Lankan born Australian academic
Janek Schaefer (born 1970), London-based sound artist, musician, composer. Visiting Professor of Sound Art at Oxford Brookes University.
Janek Sirrs (born 1965), visual effects artist
Janek Tombak (born 1976), Estonian professional road bicycle racer
Janek Wiśniewski, fictional name given to Zbigniew Godlewski in the poem Ballad of Janek Wiśniewski
Surname:
Ivan Janek (born 1986), Slovak football player
Kyle Janek, M.D. (born 1958), former Republican member of the Texas Senate
Tomas Janek, Slovak professional ice hockey player