Zijin County (Chinese Postal Map Romanisation: Tzekim; Chinese: 紫金縣; Hakka Pha̍k-fa-sṳ: Tsṳ́-kîm-yen) is a county of Guangdong Province, China. It is under the administration of Heyuan city. The county was known as Yongan County (Chinese Postal Map Romanisation: Wingon) before January 1914.
As citizens in Zijin are mostly Hakka People, Hakka Chinese is the most common language there.
In 2007, GRP of Zinjin is 46.7 hundred million dollars, and its gross output value of industry and agriculture is 55.21 hundred million dollars.
Coordinates: 23°30′29″N 115°02′04″E / 23.50806°N 115.03444°E