Vinnytsia Oblast (Ukrainian: Вінницька область, translit. Vinnyts’ka oblast’; also referred to as Vinnychchyna - Ukrainian: Вінниччина) is an oblast of Ukraine. Its administrative center is Vinnytsia.

The area of the region is 26,500 km²; its population (as of 2004-05-01) is 1.7 million.

The Vinnytsia Oblast was founded on February 27, 1932, its area makes 4.5% of the state's territory. The oblast is located in the central part of the Right Bank Ukraine and borders on seven administrative oblasts of Ukraine. In the southwest of the oblast along the Dnister river passes a 202 kilometer long section of the state border with Moldova.

Administratively the oblast's territory is divided into 27 village districts, the oblast center is divided into 3 town districts. The oblast has 17 towns, 30 town type villages and 1,467 villages. The town of Vinnytsia, which is over 630 years old, has more than 400 thousand residents.

As of 1 January 1997 the urban population of the oblast was 886,700 and the rural 975,500. The population density is 70 people per km². The proportion of employable population is 56.4%.

Vinnytsia (Ukrainian: Ві́нниця, pronounced [ˈwinːɪt͡sʲɑ]; also known by other names) is a city located on the banks of the Southern Bug, in central Ukraine. It is the administrative center of Vinnytsia Oblast.

Vinnytsia is also known by a variety of other names, such as Vinnytsya, Vinnitsa (Russian: Ви́нница), Vinnica (Polish: Winnica), German: Winniza, and Romanian: Vinniţa. All of the variations of the city's name originate with the Slavic word for Vineyards, ultimately derived from Latin vīnea for the word vine. Some of these reflect names in foreign languages that have had historical influences on the city.

Vinnytsia is located about 260 km (160 mi) from the Ukrainian capital, Kyiv, 429 km (267 mi) from the port city Odesa, and 369 km (229 mi) from L’viv.

It is the administrative center of the Vinnytsia Oblast (province), as well as the administrative center of the surrounding Vinnytskyi Raion (district) within the oblast. The city itself is also designated as its own separate raion within the oblast, and rests in the historic region of Podillia.