César Villanueva Arévalo (born August 5, 1946) is a Peruvian politician who was the Prime Minister of Peru from April 2018 to March 2019, and previously served as Prime Minister from 2013 to 2014.
In 2007, he became President of the San Martín Region.
He was sworn in as Prime Minister by President Ollanta Humala on 31 October 2013, and is affiliated with centre-left parties.