There are about three hundreds tribes in Indonesia....
Some of the main tribes are as stated below....

1. Aceh Tribe
mainly live in aceh province

2. Batak Tribe
mainly live in north sumatera province

3. Nias Tribe
mainly live in nias island

4. Minang Tribe
mainly live in west sumatera province

5. Malay Tribe
mainly live in sumatera and kalimantan island

to be continued