John of Küküllő (c. 1320 – 1393) was a Hungarian clergyman, royal official and historian.
Born as John Apród of Tótsolymos, John was the son of Miklós Apród, a nobleman who received Tótsolymos (now Šarišské Sokolovce in Slovakia) from Charles I of Hungary. He was born around 1320.
He worked as a notary for the royal chancery before 1350. He became a canon in the Arad Chapter and the Eger Chapter in 1352.
He died between 15 September and 10 December 1393.
He wrote a biography of Louis I of Hungary after 1360. He was the first Hungarian historian to use royal charters while writing his book.