Xiao Zhi (蕭寘) (died 865) was an official of the Chinese dynasty Tang dynasty, who briefly served as a chancellor during the reign of Emperor Yizong.

Very little is known about Xiao Zhi's career. His family descended from the imperial house of Liang dynasty and had a number of members who served as chancellor during Tang dynasty, including his great-great-grandfather Xiao Song and his grandfather Xiao Fu. However, he had no biography in either of the official histories of Tang, the Old Book of Tang and the New Book of Tang — although the New Book of Tang noted in his grandfather Xiao Fu's biography:

In any case, it is known that as of 864, Xiao Zhi was serving as the deputy minister of defense (兵部侍郎, Bingbu Shilang) and the director of taxation, when Emperor Yizong gave him the designation Tong Zhongshu Menxia Pingzhangshi (同中書門下平章事), making him a chancellor de facto. Xiao Zhi served as chancellor until his death in 865. Xiao Zhi's son Xiao Gou later served as a chancellor during the reign of Emperor Yizong's son Emperor Xizong.

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蕭寘（？ - 865年），唐朝蘭陵蕭氏，在唐懿宗在位期間，864年—865年擔任宰相（同中書門下平章事）。

蕭寘是南朝梁皇族的後裔，他的高祖父蕭嵩和祖父蕭複都當過宰相。蕭寘任宰相之前的經歷幾乎沒有記載，僅知大約武宗、宣宗年間曾充翰林學士。《舊唐書》和《新唐書》一般有宰相的傳，卻都沒有他的傳。但《新唐書》他祖父蕭複的傳提到他：

咸通五年四月（864年），兵部侍郎、判戶部蕭寘被唐懿宗任命為同中書門下平章事。咸通六年三月（865年，存疑），中書侍郎、同平章事蕭寘去世。蕭寘之子蕭遘後來在唐僖宗的時候任宰相。

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