This is a list of national secretaries of the Italian Communist Party. Until 1926, the office of secretary didn't exist. Amadeo Bordiga was member of the Executive Committee and Central Committee in the Communist Party of Italy (PCd'I).
| Name | Term | |
|---|---|---|
| Amadeo Bordiga | January 1921 - 1924 | |
| Antonio Gramsci | 1924 - 1926 | |
| Palmiro Togliatti | 1927 - 1934 | |
| Ruggero Grieco | 1934 - 1938 | |
| Palmiro Togliatti | 1938 - August 1964 | |
| Luigi Longo | August 1964 - March 1972 | |
| Enrico Berlinguer | March 1972 - June 1984 | |
| Alessandro Natta | June 1984 - June 1988 | |
| Achille Occhetto | June 1988 - February 1991 |