Nandan (Chinese: 南丹; pinyin: Nándān, Zhuang: Nanzdanh) is a county of Hechi City, in the northwest of Guangxi, China.

It has an area of 3,902 km2 (1,507 sq mi) and a population of 291,421 (2010).

[2] Chengguan (城关镇), Dachang (大厂镇), Chehe (车河镇), Mangchang (芒场镇), Liuzhai (Liuchai) (六寨镇), Yueli (月里镇), Wu'ai (吾隘镇), Luofu (罗富镇) Zhongbao Miao Ethnic Township (中堡苗族乡), Bawei Yao Ethnic Township (八圩瑶族乡), Lihu Yao Ethnic Township (里湖瑶族乡) In 2010 Nandan's population was 291,421.

Ethnic groups include Zhuang, Han, Yao, Mulao, Maonan, Miao, and Shui.

In these ethnic groups, Zhuang population was 101,165 (34.71%), Han was 75,903 (27.27%).