Christian V, Count of Oldenburg (c. 1342 – 1399) was the ruling count of Oldenburg from 1368 until 1398. He was born sometime before 1347 to Count Conrad I of Oldenburg and Ingeborg of Brunswick. After his father died in 1347, he ruled Oldenburg jointly with his elder brother Conrad II. In 1403, his son Christian VI became joint ruler with his other son Dietrich, Count of Oldenburg, and with the son of Conrad II, Maurice II, who had previously ruled by himself from his father's death in 1401.