Donetsk Oblast, also referred to as Donechchyna, is an oblast in eastern Ukraine. It is Ukraine's most populous province, with around 4.1 million residents. Its administrative centre is Donetsk, though due to the ongoing Russo-Ukrainian War, the regional administration was moved to Kramatorsk. Historically, the region has been an important part of the Donbas region. From its creation in 1938 until November 1961, it bore the name Stalino Oblast, in honour of Joseph Stalin. As part of the de-Stalinization process, it was renamed after the Siversky Donets river, the main artery of Eastern Ukraine. Its population is estimated at 4,100,280.

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.