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

The members are elected via plurality-at-large voting: the province is divided into four districts, the first and fourth districts sending three members each, while the second and third districts sending two members 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.

The districts used in appropriation of members is coextensive with the legislative districts of Nueva Ecija.

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). Nueva Ecija's provincial board also has a reserved seat for its indigenous people (IPMR).