Poppo II (died 1098), Count of Weimar-Orlamünde, was margrave of Carniola from 1070 and of Istria from 1096 to his death.
Life Poppo was the son of Margrave Ulric I of Carniola and Sophia of Hungary, daughter of King Béla I of Hungary. He succeeded his father upon his death in 1070.
Poppo married Richgard (lt: Richardis), daughter of Count Engelbert I, Margrave of Istria, who governed Istria until his death on 1 April 1096. According to the 1170 Historia Welforum chronicle, Poppo and Richgard had two daughters: Sophia of Istria (d. 1132), married Count Berthold II of Andechs, mother of Margrave Berthold I of Istria (1110 or 1122 – 1188) Hedwig, married firstly Count Herman I of Winzenburg and secondly Count Adalbert II of Bogen.
Poppo remained a loyal supporter of the Salian emperor Henry IV during the Investiture Controversy. Because of his lack of surviving sons, he was succeeded by his younger brother Ulric II.
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