Tanjong Datu is a state constituency in Sarawak, Malaysia, that has been represented in the Sarawak State Legislative Assembly since 1991.

The state constituency was created in the 1987 redistribution and is mandated to return a single member to the Sarawak State Legislative Assembly under the first past the post voting system.

According to the gazette issued on 31 October 2022, the Tanjong Datu constituency has a total of 15 polling districts.

"Federal Government Gazette - Notice of Contested Election - By-election of the State Legislative Assembly of N.03 Tanjong Datu for the State of Sarawak [P.U.

"Federal Government Gazette - Notice of Contested Election, State Legislative Assembly of the State of Sarawak [P.U.