| Regnal Name: | Sri Ishanatunggawijaya |
| Spouse: | Lokapala |
| Issue: | Makutawangsa Wardhana |
| Father: | Rakai Halu Dyah Siṇḍok |
| Mother: | Rakryan Parameswari Dyah Kbi |
| Succession: | Queen of Mataram |
| Reign: | 947 – ? |
| Predecessor: | Rakai Hino Dyah Siṇḍok |
| Successor: | Makutawangsa Wardhana |
| Royal House: | Ishana |
Isyana stylized as Sri Isyana Tunggawijaya was a queen regnant of Mataram Kingdom, in East Java, that ruled since 947 CE. She co-reigned with her spouse, Sri Lokapala.[1] The Isyana dynasty, established by her father, Mpu Sindok that ruled Java circa the 10th century CE, was named after her.[2]
Sri Isyana Tunggawijaya was the daughter of Mpu Sindok, a Javanese king that moved the capital of Mataram Kingdom from central Java to east Java.[1] Nothing much is known from her reign, except that her husband was Sri Lokapala, a nobleman from neighboring Bali island.
Inscription dated from Sri Isyana-Sri Lokapala reign is Gedangan inscription dated 950, mentioned about a royal award of Bungur Lor and Asana villages for Buddhist sangha (priest community) in Bodhinimba. According to Pucangan inscription, the successor of royal couple Isyana-Lokapala was their son, Sri Makutawangsa Wardhana.