Oblasts of the Soviet Union

The oblasts of the Soviet Union were second-level administrative units of the Soviet Union, and first-level entities of the republics of the Soviet Union.

Oblast is a Slavic term that exists in the Russian language.

Russian was official in all republics along with national languages of other republics.

In the 1950s there were 10 oblasts in the three Baltic republics.

In the 1950s there were 4 oblasts in two of the three Transcaucasian republics (only in Azerbaijan and Georgia).