The Chagatai are one of the Tajik peoples of Uzbekistan

Uzbekistan

Uzbekistan , officially the Republic of Uzbekistan is a doubly landlocked country in Central Asia and one of the six independent Turkic states. It shares borders with Kazakhstan to the west and to the north, Kyrgyzstan and Tajikistan to the east, and Afghanistan and Turkmenistan to the south....

. The Chagatai live in the Surxondaryo Province

Surxondaryo Province

Surxondaryo Province , old spelling Surkhandarya Province is a viloyat of Uzbekistan, located in the extreme south-east of the country. Established on March 6, 1941, it borders on Turkmenistan, Tajikstan, Afghanistan and Qashqadaryo Province. It covers an area of 20,100 km²...

 in south-east Uzbekistan and in southern Tajikistan. They numbered 63,500 in 1924-25. Together with the Kharduri

Kharduri people

The Kharduri are a group of formerly semi-nomadic Tajiks of unknown origin. They live in Surxondaryo Province in south-east Uzbekistan . The Kharduri numbered about 8,400 in 1924-25....

, the Chagatai are one of the ethnographic groups of Tajiks who maintain a distinct identity. The origin of the people is unknown, although the name Chagatai is of Mongol origin, as Chagatai was a grandson of Genghis Khan

Genghis Khan

Genghis Khan , born Temujin and occasionally known by his temple name Taizu , was the founder and Great Khan of the Mongol Empire, which became the largest contiguous empire in history after his death....

.

The Turkic Chagatai language

Chagatai language

The Chagatai language is an extinct Turkic language which was once widely spoken in Central Asia, and remained the shared literary language there until the early twentieth century...

is not the language of the Chagatai Tajiks.