| Herriko Alderdi Sozialista | |
| Native Name: | Basque Socialist Party |
| Merged: | Euskal Herriko Alderdi Sozialista[1] |
| Newspaper: | Euskaldunak |
| Ideology: | Basque independence Revolutionary socialism Marxism-Leninism Abertzale Left |
| Position: | Far-left |
| Colorcode: | darkgreen |
| Flag: | File:Flag of the Basque Country.svg |
| Country: | France |
| State: | Basque Country |
Herriko Alderdi Sozialista (English: People's Socialist Party; HAS) was a revolutionary socialist Basque political party, with presence only in the French Basque Country.
HAS was founded in 1974 in Bayonne by ex-members of Enbata, a Basque nationalist organization banned in January of the same year by the French president Georges Pompidou.[2] One of the main goals of HAS was to give support to the independentist struggle in the Southern Basque Country and to organize mobilizations of support to the Basque prisoners and to the ETA(m) militants that were being judged in the Process of Burgos.[3]