| Colorcode: | red |
| Sardinian Socialist Action Party | |
| Native Name: | Partito Sardo d'Azione Socialista |
| Founder: | Emilio Lussu |
| Foundation: | 1948 |
| Dissolution: | 1949 |
| Split: | Sardinian Action Party |
| Merged: | Italian Socialist Party |
| Headquarters: | Cagliari, Sardinia, Italy |
| Position: | Left-wing |
| Seats4 Title: | Regional Council of Sardinia (1948-1949) |
| Country: | Sardinia |
The Sardinian Socialist Action Party (Italian: Partito Sardo d'Azione Socialista, PSd'AzS) was a regionalist social-democratic political party active in Sardinia.
The party was founded in 1948 by a split from the Sardinian Action Party led by Emilio Lussu, former member of the "Sassari brigade" during the Italian resistance movement.[1] [2] The party won 6.6% in the first regional election in 1949 and shortly after merged with the Italian Socialist Party, a party of which Lussu was a senator until 1963.[2]