Soviet Union: Chairmen of the Council of People's Commissars: 1923-1946

Zamestitel' Predsedatelja Soveta Narodnyh Komissarov Sojuza Sovetskih Socialističeskih Respublik (Заместитель Председателя Совета Народных Комиссаров Союза Советских Социалистических Республик) \| Deputy Chairman of the Council of People's Commissars of the Union of Soviet Socialist Republics (ex officio) [1][2]
17 Jul 1923 - 2 Feb 1924	Lev Kamenev (Лев Каменев) [3]
17 Jul 1923 - 2 Feb 1924	Aleksej Rykov (Алексей Рыков) [3]
17 Jul 1923 - 2 Feb 1924	Aleksandr Dmitrievič Cjurupa (Александр Дмитриевич Цюрупа)
17 Jul 1923 - 2 Feb 1924	Vlas Jakovlevič Čubar' (Влас Яковлевич Чубарь) [4]
17 Jul 1923 - 2 Feb 1924	Mamija Dmitrievič Orahelašvili (Мамия Дмитриевич Орахелашвили) [5]
Predsedatel' Soveta Narodnyh Komissarov Sojuza Sovetskih Socialističeskih Respublik (Председатель Совета Народных Комиссаров Союза Советских Социалистических Республик) \| Chairman of the Council of People's Commissars of the Union of Soviet Socialist Republics
2 Feb 1924 - 19 Dec 1930	Aleksej Rykov (Алексей Рыков)
19 Dec 1930 - 6 May 1941	Vjačeslav Molotov (Вячеслав Молотов)
6 May 1941 - 15 Mar 1946	Iosif Stalin (Иосиф Сталин)

The deputy chairmen exercised the functions of Chairman of the Council of People's Commissars of the USSR Vladimir Lenin (Владимир Ленин) who was appointed on 6 Jul 1923, but did not take office. After the death of Lenin (21 Jan 1924), the deputy chairmen continued to exercise the functions of the Chairman until the appointment of Rykov.
The Chairman and Deputy Chairmen of the Council of People's Commissars of the USSR were appointed by the Central Executive Council of the USSR on 6 Jul 1923 and took offices on 17 Jul 1923.
Also in Russia.
Also in Ukraine.
Also in Transcaucasia.