Uijeongbu is a city in Gyeonggi Province, South Korea. It is the tenth-most populous city in the province and a suburb of Seoul within the greateā¦Uijeongbu is a city in Gyeonggi Province, South Korea. It is the tenth-most populous city in the province and a suburb of Seoul within the greater Seoul Metropolitan Area. Uijeongbu was established in 1400, during the reign of Jeongjong. The city housed the Yeonguijeong, Jwauijeong and Uuijeong who oversaw state affairs while assisting the monarch until 1907.