This study examined perceptions of institutional apologies related to past political violence and socio-emotional climate among victims and non-victims in Argentina (n = 518), Chile (n = 1,278), and Paraguay (n = 1,172) based on quasi-representative samples. The perceptions of apology as sincere and efficient in improving intergroup relations were associated with a positive socio-emotional climate across the three nations. Victims evaluated apologies more positively and perceived a more positive socio-emotional climate compared to non-victims in Paraguay and Argentina, whereas the opposite was true in Chile where the government opposed the victims' leftist political orientation. The evaluations of apologies also mediated the effects of exposure to violence on the perception of socio-emotional climate, but these effects were moderated by the context. Together, these findings suggest that apologies reinforce positive sociopolitical climate, and that, personal experience of victimization is an important factor determining these effects., (© 2017 The British Psychological Society.)