Lantian County (Chinese: 蓝田县, pinyin:Lántián Xiàn) is a county of Xi'an, Shaanxi, China. It is in the southeast part of Xi'an. Qinling Mountains is south of it. It covers 2,005.95 square kilometres (774.50 sq mi). As of November 2010, 514,026 people lived there. It is famous for Lantian jade. Its main work is agriculture and tourism.