Armenian Oblast ended in 1840.
Armenian Oblast was created in 1828.
The population of Armenian Oblast, a historical administrative division in the Russian Empire, was around 450,000 in the late 19th century. It is important to note that Armenian Oblast no longer exists as a political entity and is now part of modern-day Armenia.
Crimean Oblast ended in 1991.
Gharm Oblast ended in 1955.
Kars Oblast ended in 1917.
Kamchatka Oblast ended in 2007.
Chita Oblast ended in 2008.
Adyghe Autonomous Oblast ended in 1991.
Don Host Oblast ended in 1920.
Tuvan Autonomous Oblast ended in 1961.
Syr-Darya Oblast ended in 1917.
Ingush Autonomous Oblast ended in 1936.