Nagarzê County (Tibetan: སྣ་དཀར་རྩེ་རྫོང་, Wylie: sna dkar rtse rdzong, Chinese: 浪卡子县; Pinyin: Làngkǎzǐ Xiàn) is a county of the Shannan Prefecture located in the south-east of the Tibet Autonomous Region. The Yarlung Tsangpo river dominates the county.