This study investigated romantic relationship attitudes and experiences as factors of interethnic romantic relationships among Native American (NA) emerging adults. The study included 114 participants ages 18 to 25 years from about 70 NA indigenous groups across North America. Factors were organized into the moral, societal, and psychological domains of the social-cognitive domain theory. Factors identified by this study included four significant predictors of past interethnic dating and three significant predictors of future likelihood of NA dating among emerging adults with differences between NA relationships with Whites or with other minorities. Past dating experiences associated with strong White identity, past multicultural interaction, diversity climate in childhood community, and past parental support of interethnic dating relationships. Future likelihood of engagement in interethnic romantic relationships for NA emerging adults associated with past interethnic dating and other multicultural interactions. Past multicultural interactions was the only predictor that emerged in NA romantic relationships with both Whites and other minorities.