Anak Agung Ngurah Oka Ratmadi (born in Denpasar on 2 November 1945), commonly known as Cok Rat, was the regent of Badung Regency, Bali, Indonesia from 1999 to 2005, and currently a member of the Regional Representative Council (DPD) from Bali since 2014.
He was nominated for the Governor of Bali in 2003, but he withdrew.
He is the great-grandson of I Gusti Ngurah Made Agung, a National Hero of Indonesia who fought against the Dutch.
He has three children, the second one, AA Krisna Yoga, died on 7 March 2016.