Guangnan County (simplified Chinese: 广南县; traditional Chinese: 廣南縣; pinyin: Guǎngnán Xiàn; Zhuang: Gvangjnanz Yen) is located in Wenshan Zhuang and Miao Autonomous Prefecture, Yunnan province, China.

The seat of Guangnan, known today as Liancheng (莲城镇), was the heart of the Gouding Kingdom (句町) that lasted approximately 400 years, from 111 BC to 316 AD.

May thru September accounts for nearly 75% of the annual rainfall of 1,016 mm (40 in) The following information in this section is from the Guangnan County Gazetteer (广南县志) (2001).

There were 35,879 ethnic Yi individuals comprising 7,001 households as of 1995, making up 5.21% of the county's total population.

Liancheng Township, the county seat, had 161 ethnic Hui individuals comprising 51 households.