The Shāndōng Peninsula ( ) also known as the Jiāodōng Peninsula (胶东半岛; 膠東半島) is a peninsula in the Shāndōng province of northeastern China. It marks the southern limit of the Bóhăi Sea.

Cities on the peninsula include: Qingdao, Yantai and Weihai.

The local dialect of Mandarin is known as Jiao-Liao, also spoken on the Liáodōng peninsula to the north across the Bóhăi Sea.