Donetsk Oblast, also referred to as Donechchyna (Ukrainian: Донеччина, IPA: [doˈnɛtʃːɪnɐ]), is an oblast in eastern Ukraine. Before the 2022 Russian invasion of Ukraine, it was Ukraine's most populous province, with around 4.1 million residents. Its administrative center 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 Donets river, the main artery of Eastern Ukraine. Its population is estimated at 4,100,280 (2021 est.).
The oblast is known for its urban sprawl of Donetsk–Makiivka and Horlivka–Yenakiieve and it is often associated with the coal mining industry.