Chuvash Autonomous Oblastball was an Autonomous Oblastball of Russian SFSRball, Soviet Unionball.
 Union of Soviet Socialist Republics: Lаnd оf
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| Principal republics |  Armenian SSRball •  Azerbaijan SSRball •  Byelorussian SSRball •  Georgian SSRball •  Kazakh SSRbrick •  Kirghiz SSRball •  Russian SFSRball •  Tajik SSRball •  Turkmen SSRball •  Ukrainian SSRball •  Uzbek SSRball
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| Post-World War II |  Estonian SSRball •  Latvian SSRball •  Lithuanian SSRball •  Moldavian SSRball •  Bulgarian SSRball •  Polish SSRball •  Russian Antarcticaball |
| Short-lived |  Karelo-Finnish SSRball •  Transcaucasian SFSRball
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| Not union republics |  SSR Abkhaziaball •  Bukharan PSRball •  Khorezm SSRball •  Pridnestrovian Moldavian SSRball
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