John Luk Jok (died 2 June 2020) was a Sudanese politician. He was educated at the University of Khartoum from 1974 to 1977, where he earned a law degree. He later graduated from the London School of Economics in 1983. Jok served as Minister of Justice from 10 July 2011 until 12 March 2020, when he was appointed Minister of East African Affairs in the Cabinet of South Sudan. Jok died in his home at Juba on 2 June 2020, aged 68 from COVID-19.