Abstract
The paper considers the history of approval of Orenburg city as the capital of Kirgiz (Kazakh) Autonomous Socialist Soviet Republic (KASSR) which was formed by the decree from 26 of August, 1920, as well as the history accession of the city and some district of province to Kazakhstan. The reasons of choice of Orenburg as administrative center of Kirgiz Republic and possible proposed alternatives are researched. The author analyses publications of Kazakhstan and Russian scientists on the indicated theme. Among the objective reasons of choice of Orenburg as the capital, the author names the following ones: the importance of Orenburg for Kirgiz Republic of that time, as a city with developed infrastructure and industry, as well as cultural and economic potential; the presence of sufficiently strong stratum workers,; attempt to make the city a central core of politics and become closer to Asian and Turkic people; regulation of territorial disputes about question of accessory of Orenburg; temporariness of the capital status of Orenburg to Kyrgyzia, in view of geographical distance of the city from the other regions of Autonomy and little representatives of title Kazakh ethnos. The author introduces for scientific use some documents of the State archive of the Orenburg Region in the process of research.