The Negros Occidental Provincial Board is the Sangguniang Panlalawigan (provincial legislature) of the Philippine province of Negros Occidental.

The members are elected via six provincial board districts, coextensive with the legislative districts of Negros Occidental, each sending two members to the provincial board; the electorate votes for two members, with the two candidates with the highest number of votes being elected.

As ex officio presiding officer, he only votes to break ties.

An additional three ex officio members are the presidents of the provincial chapters of the Association of Barangay Captains, the Councilors' League, the Sangguniang Kabataan provincial president; the municipal and city (if applicable) presidents of the Association of Barangay Captains, Councilor's League and Sangguniang Kabataan, shall elect amongst themselves their provincial presidents which shall be their representatives at the board.

These are members representing a group of elected barangay chairpersons from 31 ABC councils of Negros Occidental.