Tancheng County is a of Linyi, Shandong province, People's Republic of China.
Tancheng is located on the southern edge of the province of Shandong, about 90 kilometres south of Linyi and 400 kilometres south east of Jinan, the capital city of Shandong province.
The population in 2001 was 970,000. The land area of the county is about 1,306.58 square kilometres. It is a developing city in a rural area.