This is a list of national secretaries of the Italian Communist Party. Until 1926 though the office of secretary did not exist. Amadeo Bordiga and Antonio Gramsci were members of the Executive Committee and Central Committee in the Communist Party of Italy (PCd'I).
| No. | Portrait | Name (Birth–Death) |
Term of office | ||
|---|---|---|---|---|---|
| 1 | 
|
Amadeo Bordiga (1889–1970) |
January 1921 | March 1923 | |
| 2 | 
|
Antonio Gramsci (1891–1937) |
14 August 1924 | 8 November 1926 | |
| – | 
|
Palmiro Togliatti (1893–1964) |
November 1926 | January 1934 | |
| 3 | 
|
Ruggero Grieco (1893–1955) |
January 1934 | May 1938 | |
| 4 |
|
Palmiro Togliatti (1893–1964) |
May 1938 | August 1964 | |
| 5 | 
|
Luigi Longo (1900–1980) |
22 August 1964 | 16 March 1972 | |
| 6 | 
|
Enrico Berlinguer (1922–1984) |
17 March 1972 | 11 June 1984 | |
| 7 | 
|
Alessandro Natta (1918–2001) |
26 June 1984 | 10 June 1988 | |
| 8 | 
|
Achille Occhetto (1936–) |
21 June 1988 | 3 February 1991 | |