A hajduk is a type of irregular infantry found in Central and parts of Southeast Europe from the late 16th to mid 19th centuries.

Hajduk may also refer to:

It may also refer to the following sport clubs: HNK Hajduk Split, Croatian football club FK Hajduk Beograd, Serbian football club FK Hajduk Kula, Serbian football club FK Hajduk Veljko, Serbian football club

It may also refer to the following people: Anja Hajduk (born 1963), German politician Frankie Hejduk, American football (soccer) player John Hejduk, American architect, artist and educator Milan Hejduk, Czech ice hockey player Stacy Haiduk, American actress

See also Hajdú (disambiguation)