The republics of Turkestan include the Turkish Republic of Northern Cyprus, the Altai Republic, and the Chuvash Republic. The Nakhichevan Autonomous Republic and the Sakha Republic are also the republics of Turkestan.
Second East Turkestan Republic ended in 1949.
Second East Turkestan Republic was created in 1944.
First East Turkestan Republic was created in 1933.
First East Turkestan Republic ended in 1934.
Turkestan Autonomous Soviet Socialist Republic was created in 1918.
Tajikistan
Turkestan means "Land of the Turks." One republic of Turkestan has people of Persian origin. The republic is named Uzbekistan.
Historically, most of Turkestan was controlled by the Russian Empire and its successor, the Soviet Union. With the fall of the Soviet Union, the various Turkic republics became independent. Now the largest foreign occupier of Turkestan is the People's Republic of China, which still controls East Turkestan (called Xinjiang by the PRC government).
The question as phrased makes no sense. Turkestan as a united entity did not exist, so there cannot be "former republics." Perhaps the question was a mash-up of the question: "What are the 5 former republics of the Soviet Union that form Turkestan?" for which the answer would be: Uzbekistan, Kazakhstan, Kyrgyzstan, Turkmenistan and Tajikistan.
The population of Turkestan - city - is 85,600.
Communist Party of Turkestan ended in 1924.
Communist Party of Turkestan was created in 1918.