Longchuan County (Chinese Postal Map Romanisation: Lungchun; simplified Chinese: 龙川县; traditional Chinese: 龍川縣; pinyin: Lóngchuān Xiàn; literally: "dragon river county") is a county of northeastern Guangdong province, China, bordering Jiangxi to the north and on the upper reaches of the Dong and Han Rivers. It is under the administration of Heyuan City, and in 2004 had a population of 870,000 living in an area of 3,089 km² (1,193 sq mi).