Pharnaces I of Pontus served as the fifth king of the Kingdom of Pontus during the 2nd century BC. He was the son of King Mithridates III and his wife Laodice, and he was born and raised within the borders of his kingdom.
His reign was characterized by his dual heritage, as he was of both Persian and Greek ancestry. Following his death, the throne passed to his siblings, Mithridates IV of Pontus and Laodice, ensuring the continuation of the Mithridatic line during a pivotal era in the region's history.