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

The members are elected via plurality-at-large voting: the province is divided into six districts, the first district of Rizal sending four members, the second district of Rizal sending two members, the third and fourth districts sending one member each, and Antipolo's two districts sending one member each to the provincial board; the number of candidates the electorate votes for and the number of winning candidates depends on the number of members their district sends.

The vice governor is the ex officio presiding officer, and only votes to break ties.

The vice governor is elected via the plurality voting system province-wide.

Aside from the regular members, the board also includes the provincial federation presidents of the Liga ng mga Barangay (ABC, from its old name "Association of Barangay Captains"), the Sangguniang Kabataan (SK, youth councils) and the Philippine Councilors League (PCL).