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.

An oblast in Ukraine, sometimes translated as region or province, is the main type of first-level administrative division of the country. Ukraine's territory is divided into 24 oblasts, as well as one autonomous republic and two cities with special status. Ukraine is a unitary state, thus the oblasts do not have much legal scope of competence other than that which is established in the Ukrainian Constitution and devolved by law. Articles 140–146 of Chapter XI of the constitution deal directly with local authorities and their competence.