Tancheng County (Chinese: 郯城县; pinyin: Tánchéng Xiàn) is a county under the administration of Linyi City, in Shandong Province, People's Republic of China.Tancheng is located on the southern edge of Shandong Province and borders Jiangsu. It is about 90 kilometres (by road) south of Linyi City and 400 kilometres southeast 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.