Colcu may refer to:
Colcu mac Domnaill (d. 580), king of Ailech Colgú mac Faílbe Flaind (d. 678), king of Munster Colcú mac Bressail (d.722), father of Áed mac Colggen, king of Leinster Colcu ua Duinechda (d. 796), abbot of Clonmacnoise Colcu mac Connacan (d. 884), abbot of Kinnitty Çölçü, a 2012 Azerbaijani drama film