Kanowit is a town and the capital of Kanowit District, Sibu Division, Sarawak, Malaysia, comprising 2,253.5 square kilometres. As of 2010, Kanowit's population is 28,985. It is built on the mouth of Kanowit River at the bank of Rajang River, approximately 174 kilometers from the coast of South China Sea. It takes 45 minutes to reach the town by land transport and an hour by boat from Sibu. The main ethnic groups are Iban, Chinese, Malay, and Melanau.

The Rajang River is a river in Sarawak, northwestern Borneo, Malaysia. The river originates in the Iran Mountains, flows through Kapit, and then towards the South China Sea. At approximately 565 km long (351 mi), the river is the seventh-longest in Borneo and the longest in Malaysia.