ASSR may refer to:

Politics

• Autonomous Soviet Socialist Republics of the Soviet Union
• Armenian Soviet Socialist Republic, now Armenia (generally abbreviated ArmSSR)
• Azerbaijan Soviet Socialist Republic, now Azerbaijan (generally abbreviated AzSSR)

Others

• Akademikerförbundet SSR, a Swedish trade union of professional workers
• Auditory steady-state response, a steady-state evoked potential of the brainstem in response to auditory stimuli
• Archivio storico del Senato della Repubblica, Italian parliamentary archive (generally abbreviated ASSR)
• Archives de sciences sociales des religions, a French academic journal about religion (generally abbreviated ASSR)