Bruit Island is an island in Daro District, Mukah Division, Sarawak, Malaysia. It is located in the Rejang Delta, 150 km northwest of Kuching. With a population of around 9,342 and an area of 417 square kilometres, it is the second largest island in Malaysia after Banggi Island. The mudflats at the northern end of the island have been designated an Important Bird Area by BirdLife International.