John II, Count of Oldenburg

John II (first attested in 1272, died 1315) was Count of Oldenburg, succeeding his father Christian III in 1285 under the guardianship of his uncle Otto II until 1289. Around 1292–1293 he joined Otto's failed attack on the Stedinger lands of the Bremen archbishopric and waged feuds against the Stedinger peasants.

From 1301 he issued charters jointly with his brother Christian. He died in 1315, leaving his sons Christian IV and John III to succeed him.