Suixi County (postal: Suikai; Chinese: 遂溪; pinyin: Suìxī; Jyutping: seoi6kai1) is a county in the southwest of Guangdong province, China.

It is under the administration of the prefecture-level city of Zhanjiang and is located at the northern end of the Leizhou Peninsula, bordering the Gulf of Tonkin to the west.

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