Adalbero (died 1086 or 1087) was Margrave of Styria from 1064 until 1082. He sided with the Emperor in the investiture dispute, which led to a confrontation with his younger brother Ottokar II, who sided with the pope and succeeded him in 1082.
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| width="30%" align="center" | Preceded by:
Ottokar I
| width="40%" align="center" | Margrave of Styria
| width="30%" align="center" | Succeeded by:
Ottokar II