Armenian Oblast ended in 1840.
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.
Armenian Oblast was created in 1828.
Gharm Oblast ended in 1955.
Chita Oblast ended in 2008.
Kamchatka Oblast ended in 2007.
Crimean Oblast ended in 1991.
Kars Oblast ended in 1917.
Adyghe Autonomous Oblast ended in 1991.
Tuvan Autonomous Oblast ended in 1961.
Don Host Oblast ended in 1920.
Ingush Autonomous Oblast ended in 1936.
Chechen Autonomous Oblast ended in 1934.