Armenian Oblast was created in 1828.
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.
Volyn Oblast was created in 1939.
Vinnytsia Oblast was created in 1932.
Kamchatka Oblast was created in 1932.
Kurgan Oblast was created in 1943.
Lipetsk Oblast was created in 1954.
Novgorod Oblast was created in 1944.
Chita Oblast was created in 1937.
Omsk Oblast was created in 1934.
Moscow Oblast was created in 1929.
Zaporizhia Oblast was created in 1939.