The sixth Sarawak state election was held between Friday, 27 September and Saturday, 28 September 1991. This election elected 56 state representatives into the Sarawak State Assembly. This election saw 72.8% of the eligible voters to cast their votes.

The Sarawak State Legislative Assembly is the legislative chamber of the unicameral legislature of the Malaysian state of Sarawak; the Yang di-Pertua Negeri of Sarawak forms the other part of the legislature. The Assembly is modelled after the traditions of the Westminster parliamentary system, which originates from the practices of the British Parliament. The executive branch of government is drawn from the elected members of the Assembly. The State Legislative Assembly sits at the Sarawak State Legislative Assembly Building located in Petra Jaya in Kuching, the state capital.