Dushanbe, the capital city of the republic, is located in Hissar Valley in the south of Tajikistan. It was named this way because it grew from a village that originally had a popular market on Monday. As of 2017, Dushanbe had a population 823，4 thousand. July 14, 1922 Dushanbe became the capital of the Tajikistan. Ince 1929 – the capital of the Tajikistan SSR.