Daishanⓘ (Chinese: 岱山; pinyin: Dàishān) is a county under the jurisdiction of Zhoushan, Zhejiang Province.

The postal code is 316200, and the county seat is located on 88 Renmin Road, Gaoting Town.

The county is located in East China Sea in northeast Zhejiang.

Daishan Island has a fishing port, and shipbuilding and ship refitting facilities.

[citation needed] The county consists of six towns and one township.