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 bordeā¦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.