Krack or KRACK may refer to:
* KRACK, an attack on the Wi-Fi Protected Access protocol
* ''Krack'' (film), an Indian Telugu-language action film
* Old style spelling of Kraks Forlag, a Danish publisher of maps
Persons
* Erhard Krack (1931–2000), East German politician
* Jake Krack (born 1984), American fiddle player
* Mike Krack (born 1972), Luxembourgish motorsport engineer