Dominance and prestige reflect different forms of power and can affect relationship outcomes. Whereas dominance is a conflict-oriented way of dealing with people and grabbing status, prestige is derived from respect and esteem that is granted by others due to superior skills and knowledge. In this research, we tested three partially competing perspectives on potential associations of dominance and prestige with relationship quality (RQ). Sociobiological perspectives suggest that both concepts ensure the provision of valuable resources, and thus predict that both dominance and prestige would be positively linked to RQ. From a sociocultural perspective, men are expected to be dominant and prestigious whereas being dominant (and perhaps being prestigious) would violate the feminine gender-role stereotype; thus, both variables should relate positively to RQ only for men. From a personality perspective, dominance is characterized by undesirable attributes, whereas prestige is characterized by more desirable attributes; as such, only prestige should be positively related to RQ. We conducted four studies with individuals in romantic relationships in three different countries (Germany, Israel, and the US; Ntotal = 2,010 participants). The participants completed measures of dominance-prestige (as general attributes, as relationship-specific attributes, or in comparison with their partner) and measures of RQ. Although not entirely consistent across studies, our results were most consistent with the personality-based perspective. Prestige seems to benefit a relationship for both actors and partners whereas dominance is detrimental to relationship happiness. Yet, as some results showed that the negative link between dominance and RQ was stronger for women than for men, and the positive link between prestige and RQ was weaker for women than for men; thus some weak support for the sociocultural perspective was also found.