Agnes of Austria (c. 1151/54 – 13 January 1182), a member of the House of Babenberg, was Queen of Hungary from 1168 until 1172 by her first marriage with King Stephen III of Hungary and Duchess of Carinthia by her second marriage with Duke Herman of Carinthia from 1173 until 1181.

Agnes was the eldest child of the Babenberg duke Henry II of Austria and his second wife, the Byzantine princess Theodora Komnene.

In 1166, Duke Henry II, who was mediating a peace between King Stephen III of Hungary and Emperor Manuel I Komnenos, proposed a marriage between his daughter, Agnes and the young king.

The negotiations with Austria were renewed and Agnes was married to King Stephen III in the same year.

[1][2][3] Just after her husband's funeral, the widowed Agnes left for the Duchy of Austria with her father.