Tongshan District (simplified Chinese: 铜山区; traditional Chinese: 銅山區; pinyin: Tóngshān Qū), formerly Tongshan County (simplified Chinese: 铜山县; traditional Chinese: 銅山縣; pinyin: Tóngshān Xiàn) is one of six districts of Xuzhou, Jiangsu province, People's Republic of China, bordering Anhui and Shandong provinces. The area derives its name from the copper-filled mountains to the north and east, and until September 2010 was a county.