Count Christian V of Oldenburg, (d. 1423), was the ruling count of Oldenburg from 1398 until his death in 1423. He was born sometime before 1347 to Count Conrad I of Oldenburg and Ingeborg von Braunschweig. He married Agnes of Honstein, and through his son and successor Count Dietrich of Oldenburg, descends the Danish Royal houses of Oldenburg and Schleswig-Holstein-Sonderburg-Glucksburg. Through the dynsastic marriages of his descendants he is an ancestor of many European Royal houses.