Tutong is a district (daerah) in Brunei, as. Its capital is Tutong . Other major towns and cities include Kuala Abang , Lamunin , Melit , Penanjong and Telisai .

The district borders the South China Sea to the north, the Bruneian district of Brunei and Muara and Malaysia to the east and the Bruneian district of Belait to the west.

The Sungai Tutong river flows through Tutong.