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.
Yaroslavl Oblast was created in 1936.
Tomsk Oblast was created in 1944.
Astrakhan Oblast was created in 1943.
Chelyabinsk Oblast was created in 1934.
Leningrad Oblast was created in 1927.
Kursk Oblast was created in 1934.
Murmansk Oblast was created in 1938.
Irkutsk Oblast was created in 1937.
magadan Oblast was created in 1953