Dangtu County (simplified Chinese: 当涂县; traditional Chinese: 當涂縣; pinyin: Dāngtú Xiàn) is one of three counties under the jurisdiction of the prefecture-level city of Ma'anshan in the southeast of Anhui Province, China.

[1][2] Dangtu is one of the longest established counties in eastern China and formed part of the Taiping Prefecture during the Ming and Qing dynasties.

It is situated on the eastern (right) bank of the Yangtze River and western shore of Shijiu Lake; it borders Jiangsu Province to the east and the prefecture-level city of Wuhu to the southwest.

A famous poet named Xie Tiao (谢朓) once praised Dangtu County as the place of beautiful mountains and rivers.

Its major exports are frozen meat, textiles, leather and plastic products.