Vinnytsia Oblast, also referred to as Vinnychchyna, is an oblast in central Ukraine. Its administrative center is Vinnytsia. The oblast has a population of 1,509,515. In 1935 bordering territories of the oblast were transformed into Soviet border districts: Shepetivka Okrug, Proskuriv Okrug, and Kamianets Okrug. In 1937 the Kamianets Oblast, based on the borde…Vinnytsia Oblast, also referred to as Vinnychchyna, is an oblast in central Ukraine. Its administrative center is Vinnytsia. The oblast has a population of 1,509,515. In 1935 bordering territories of the oblast were transformed into Soviet border districts: Shepetivka Okrug, Proskuriv Okrug, and Kamianets Okrug. In 1937 the Kamianets Oblast, based on the border districts, was formed.