Ximeng Va Autonomous County (Chinese: 西盟佤族自治县; pinyin: Xīméng Wǎzú Zìzhìxiàn; Awa: Si Mēng Vax Qux Zi Zi Sin or Si Mōung Vax Qux Zi Zi Sin) is an autonomous county under the jurisdiction of Pu'er City, in the southwest of Yunnan Province, China, bordering Myanmar's Shan State to the west.

Wa/Va people, who speak the Wa language, are the main inhabitants in Ximeng County.

In the present, Ximeng Va Autonomous County has 5 towns 1 township and 1 ethnic township.

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