Berengar of Ivrea (?-966), sometimes also referred to as Berengar II of Italy, was marquess of Ivrea, and later King of Italy. He was later deposed by the Emperor Otto I, and Italy came under direct control of the Holy Roman Empire.

At the death of King Lothar II of Italy in 950, Berengar seized the opportunity and declared himself King. He tried to legitimize his rule by forcing Adelaide, the respective daughter, daughter-in-law, and widow of the last three kings of Italy, into marriage with his son Adalbert. Adelaide's requests for intervention resulted in Otto I's invasion in 951, where Berengar was forced to pay homage to the Emperor. Otto, a widower, subsequently married Adelaide.

Berengar continued in his position as a vassal of the Empire. He intrigued with Pope John XII against Otto, and was eventually captured and imprisoned in 963.