Hallvard Gunnarssøn (c.1550 – 1608) was a Norwegian educator and author. Gunnarsson was born at Sarpsborg in Østfold. He was a pupil at the Oslo Cathedral School and later was a student at the University of Rostock. He was enrolled in 1566 and took his magister degree in 1572. Later he also studied in Wittenberg. He lectured at the Oslo Cathedral School from 1577 until his death in 1608.