The 15th Secretariat of the All-Union Communist Party (Bolsheviks) was elected by the 1st plenary session of the 15th Central Committee, in the aftermath of the 15th Congress.
Full members
| Name (birth–death) |
Took office | Left office | Duration | Note |
|---|---|---|---|---|
| Karl Bauman (1892–1937) |
29 April 1929 | 13 July 1930 | 1 year, 75 days | Elected at the 4th Plenary Session. |
| Lazar Kaganovich (1893–1991) |
12 July 1928 | 13 July 1930 | 2 years, 1 day | Elected at the 2nd Plenary Session. |
| Stanislav Kosior (1889–1939) |
19 December 1927 | 12 July 1928 | 206 days | Relieved of his duties at the 2nd Plenary Session. |
| Nikolai Kubyak (1881–1937) |
19 December 1927 | 11 April 1928 | 104 days | Relieved of his duties at the 1st Joint Plenary Session of the Central Committee and the Central Control Commission. |
| Vyacheslav Molotov (1890–1986) |
19 December 1927 | 13 July 1930 | 2 years, 196 days | — |
| Nikolai Uglanov (1886–1937) |
19 December 1927 | 29 April 1929 | 1 year, 121 days | Relieved at the 4th Plenary Session. |
| Alexander Smirnov (1878–1938) |
11 April 1928 | 13 July 1930 | 2 years, 93 days | Elected at the 1st Joint Plenary Session of the Central Committee and the Central Control Commission. |
| Joseph Stalin (1878–1953) |
19 December 1927 | 13 July 1930 | 2 years, 196 days | Elected General Secretary at the 1st Plenary Session. |
Candidate members
| Name (birth–death) |
Took office | Left office | Duration | Note |
|---|---|---|---|---|
| Aleksandra Artyukhina (1889–1969) |
19 December 1927 | 13 July 1930 | 2 years, 196 days | — |
| Karl Bauman (1892–1937) |
19 December 1927 | 29 April 1929 | 1 year, 131 days | Relieved of his duties at the 4th Plenary Session. |
| Andrei Bubnov (1883–1938) |
19 December 1927 | 13 July 1930 | 2 years, 196 days | — |
| Ivan Moskvin (1890–1937) |
19 December 1927 | 13 July 1930 | 2 years, 196 days | — |