| Conventional Long Name: | Kingdom of Sundem |
| Common Name: | Sundem |
| Native Name: | Sonda Raja |
| Status: | Kingdom |
| Status Text: | Vassal to Vijayanagara Empire, Maratha Empire and the Bijapur Sultanate at several times |
| Government Type: | Monarchy |
| Year Start: | 1763 |
| Year End: | 1935 |
| Leader1: | Sawai Basavalinga I Rajendra Udaiyar |
| Year Leader1: | 1763 - 1843 (first known) |
| Leader2: | Basavalinga II Rajendra Udaiyar |
| Year Leader2: | ? - 1935 (last) |
| Title Leader: | King of Sundem |
| Today: | India |
| S1: | Portuguese India |
Sundem was a feudal state that existed in the Indian state of Goa. The kings were called 'Sonda Raja' or 'Soundekar Raja'. They were feudatory vassals at various times to the Vijayanagara Empire, Maratha Empire and the Bijapur Sultanate. Finally they became vassals of the Portuguese Empire. They were called the 'Rei de Sundem' in Portuguese.[1]