Tatau is a town, and the capital of the Tatau District (4,945.8 square kilometres) in Bintulu Division, Sarawak, Malaysia. The district population (year 2000 census) was 25,300. Tatau became a district in 1987. Before that it was a Sub District under Bintulu District. The main spoken languages are Iban, Kenyah, Beketan and Punan.