| Gajabahu II | |
| King of Polonnaruwa | |
| Reign: | 1131–1153 |
| Predecessor: | Vikramabahu I |
| Successor: | Parakramabahu I |
| Royal House: | House of Vijayabahu |
| Mother: | Sundara Devi[1] |
| Death Date: | 1187 |
| Religion: | Theravada Buddhism |
Gajabahu II was king of Rajarata from 1131 until 1153, following his father Vikramabahu I. He was defeated and succeeded by Parakramabahu I.