Adolf II of Holstein (c. 1128 – 6 July 1164) was the Count of Schauenburg and Holstein from 1130 until his death, though he was briefly out of Holstein from 1137 until 1142. He succeeded his father Adolf I under the regency of his mother, Hildewa. After the death of the Emperor Lothair II (1137), the new king, Conrad III, granted the Duchy of Saxony to Albert the Bear. Adolf was consequently deprived of Holstein because he was a Welf supporter and refused to recognise Albert as duke. He only received it back in 1142 when Conrad and Henry the Lion were reconciled.