| Adelaide II of Büren | |
| Succession: | Abbess of Gernrode |
| Reign: | 1206–1220 |
| Predecessor: | Richinza |
| Successor: | Sophia |
| Death Date: | 3 November 1220 |
| Death Place: | Gernrode Abbey |
| Religion: | Roman Catholic |
Adelaide II of Büren (also Adelheid II. von Büren; † 3 November 1220) was the abbess of Gernrode Abbey (r. 1207–1220).
Adelaide II was a member of the von Büren dynasty, a noble family which owned property in Büren, Wünnenberg and Wewelsburg.[1] Adelaide was probably elected abbess of Gernrode abbey in early 1207. She is named as abbess in a papal diploma issued in August 1207.[2] During her time as abbess, there was conflict about the appointment of a seneschal between two Ministeriales of the abbey: the brothers Arnold and Frederick of Gernrode. The conflict was settled by Bishop Frederick of Halberstadt on 10 August 1220.[3]
Adelaide died on 3 November, probably 1220.[4]