| Language | Population | Bloc | Family | Cluster | Band | |
|---|---|---|---|---|---|---|
| ● Tutong | 19,300 | Austronesian | North Sarawakan | Lower Baram | ||
| ● Narom | 6,190 | Austronesian | North Sarawakan | Lower Baram | ||
| ● Kiput | 2,890 | Austronesian | North Sarawakan | Lower Baram | ||
| ● Belait | 1,560 | Austronesian | North Sarawakan | Lower Baram |