Tatau District is one of the two districts of Bintulu Division in Sarawak, Malaysia. It has a total area of 4,945.80 square kilometres. The largest town in the district is Tatau.

Tatau River was once under the control of the Bruneian Empire until 1861 when it was ceded to James Brooke and became part of the Raj of Sarawak.

The population of Tatau District (based on recent 2023 census) was 48,268.

Tatau is traditionally a home to Iban, Melanau, Chinese, Malay and Orang Ulu people. There is one ethnic group named "Tatau" which is unique to Tatau district.

Most Ibans are scattered throughout rural areas of Tatau. Whilst, Melanau people (or Melanau Bintulu/Vaie people) and Malay people are concentrated at Tatau and Kuala Tatau. Many Malay people are not originally from Tatau, however, intermarriage with locals especially Melanau people has made Malay as one of the major ethnics in Tatau. Chinese people are more concentrated at Tatau, while some reside at Sangan and Kuala Tatau. The Orang Ulu people, such as Kenyah, Kayan, Tatau, Penan and Punan are more scattered throughout Tatau district compared to the Iban people. Most of them still live deep in the rural areas like Ng. Tau, Kuala Baggiau and Sungai Anap.

There is a large influx of foreign worker population due to the timber industry. It was estimated more than 10% of Tatau population are foreign workers, most of whom come from Indonesia.

The economy is largely based on the timber and agricultural industries. Timber industry remains a strong component of the district's economy. Agriculture is relatively minor although growing steadily, with oil palm, rattan and pepper the main products.

Although Tatau is well connected to other parts of Sarawak with good networks of road, river transports still play the vital role in Bintulu. People of Tatau District can opt for regular shuttle bus service to Bintulu town, where then connected to other parts of Bintulu Division. The only shuttle bus operating for both town and rural services is Jepak Holding.