The Soviet Union Union of Soviet Socialist Republics (USSR ), is a socialist federation which consists of 21 nominally equal union republics , also known as national republics , each representing a specific nationality as per Soviet policy on national delimitation .
The 21 union republics are:
Flag
#
Union republic
Capital
Population
1
Russian Soviet Federative Socialist Republic
Moscow
174,517,880
2
Ukrainian Soviet Socialist Republic
Kiev
42,000,000
3
Polish Soviet Socialist Republic
Warsaw
39,000,000
4
Uzbek Soviet Socialist Republic
Tashkent
32,300,000
5
Belarusian Soviet Socialist Republic
Minsk
19,500,000
6
Kazakh Soviet Socialist Republic
Astana
18,000,000
7
Swedish Soviet Socialist Republic
Stockholm
10,215,250
8
Azerbaijan Soviet Socialist Republic
Baku
9,898,100
9
Tajik Soviet Socialist Republic
Dushanbe
8,800,000
10
Danish Soviet Socialist Republic
Copenhagen
8,789,957
11
Turkmen Soviet Socialist Republic
Ashgabat
6,600,000
12
Kyrgyz Soviet Socialist Republic
Bishkek
6,019,480
13
Finnish Soviet Socialist Republic
Helsinki
5,520,535
14
Norwegian Soviet Socialist Republic
Oslo
5,323,933
15
Georgian Soviet Socialist Republic
Tbilisi
3,718,200
16
Armenian Soviet Socialist Republic
Yerevan
3,358,239
17
Moldavian Soviet Socialist Republic
Kishinev
3,350,900
18
Lithuanian Soviet Socialist Republic
Vilnius
2,795,674
19
Karelian Soviet Socialist Republic
Petroskoi
2,288,450
20
Latvian Soviet Socialist Republic
Riga
1,925,600
21
Estonian Soviet Socialist Republic
Tallinn
1,319,133
See also [ ] 
