Christian I, known as "the Quarrelsome" (died 1167), was Count of Oldenburg from 1143 to 1167. He was son of Elimar II, Count of Oldenburg and wife Eilika von Werl-Rietberg, daughter of Count Heinrich von Rietberg.
He married Kunigunde and had two sons: Maurice, Count of Oldenburg (c. 1145 - c. 1211) and Christian the Crusader ().