The Cheongju Jeong clan (Korean: 청주 정씨; Hanja: 淸州 鄭氏) is one of the Korean clans.
Their bon-gwan is Cheongju, North Chungcheong Province.
According to a census from 2015, the population of the Cheongju Jeong clan is 46,419.
Their founder was Jeong Geuk-gyeong(Hanja: 鄭克卿), who was a military officer during the Goryeo dynasty.
[1] One of his descendants was the Joseon dynasty Neo-Confucian scholar, Jeong Gu.