Indrechtach mac Dungalaig (died 748) was a King of Brega from the Uí Chonaing sept of Cnogba (Knowth) of the Síl nÁedo Sláine branch of the southern Ui Neill.
He was the grandson of Conaing Cuirre (died 662), a previous king.
In 743 he fought the Battle of Daim Deirg in Brega where he defeated Dúngal mac Flainn, king of Fir Chúl, who was slain.
Indrechtach is called king of Ciannachta (regis Ciannachte) in his death obit in the annals.
This biography of a member of an Irish royal house is a stub.