The Qarqarçay (Gargarchay) or Karkar (Armenian: Կարկառ) is a river located in Azerbaijan, in the drainage basin of the Kura.

The Qarqar is fed by rain, snow and underground waters.

Qarqarçay, romanized as Gargarchay, consists of the name Gargar and the Turkic suffix -chay (Azerbaijani: -çay), meaning "river".

[2][verification needed] German scientist Heinrich Hübschmann explains that Karkar (Armenian: Կարկառ) is etymologized from Armenian – meaning “heap of stones”.

This article related to a river in Azerbaijan is a stub.