| Tanahbesar | |
| Location: | Oceania |
| Area Km2: | 1,604 |
| Pushpin Map: | Indonesia Maluku |
| Archipelago: | Aru Islands |
| Country: |  Indonesia |
| Country Admin Divisions 1: | Aru Islands Regency |
| Country Admin Divisions Title: | Province |
| Country Admin Divisions Title 1: | Regency |
| Timezone1: | IEST |
| Utc Offset1: | +09:00 |
| Coordinates: | -5.8047°N 134.55°W |
Tanahbesar (or Wokam) is one of the four main islands in the Aru Islands Regency in the Arafura Sea. Its area is 1604 km².It is situated in the Maluku Province, Indonesia. The other main islands in the archipelago are Kobroor, Kola, Maikoor, Koba and Trangan.[1]