Changhai County (simplified Chinese: 长海县; traditional Chinese: 長海縣; pinyin: Chánghǎi Xiàn; literally: "long sea") is under the administration of Dalian, Liaoning province, People's Republic of China. It consists of several islands in the Yellow Sea and is located offshore of the Liaodong Peninsula. There are 112 small islands and reefs in the county, traditionally called the Outer Chang Mountains Island Chain.