Shicheng (Chinese: 狮城; pinyin: Shī Chéng; lit. 'Lion City') is an ancient underwater city situated under Qiandao Lake in Chun'an County, Hangzhou, Zhejiang Province, China, and was previously the county seat of the defunct Sui'an County (Chinese: 遂安县). The city was flooded for the purpose of industrialization by the Chinese government in the year 1959 after a hydroelectric dam was required for the province of Zhejiang. According to the evidence found, the lost city was inhabited for centuries, but is now primarily used as an underwater tourist attraction by tourists and diving experts.

Shicheng was named the 'Lion City' after the nearby Wu Shi Mountain (Five Lion Mountain) in the Qiandao Lake.