Wazo of Liège (c. 985 – 1048) was bishop of Liège from 1041 to 1048, and a significant educator and theologian. His life was chronicled by his contemporary Anselm of Liège.

During this period Liège became known as an educational center. Wazo, himself a student with Heriger of Lobbes, served as scholaster, under his predecessor Notker of Liège, before himself becoming bishop.^[1]

He is noted also for his nuanced approach to cases of heresy (not common in his day). In a letter he wrote to Roger, Bishop of Châlons,^[2] he quoted the New Testament Parable of the Tares and argued "the church should let dissent grow with orthodoxy until the Lord comes to separate and judge them".^[3]

He was involved in the period 1021-5 in a controversy with John, canon and provost in Liège; Durandus of Liège, then bishop, had Wazo leave for a time.^[4] His election as bishop in 1041 was strongly contested,^[5] with Emperor Henry III against him.