Introduction <p>Two forms of ambivalent sexism, hostile and benevolent sexism, have been found to co-exist across various cultures. Studies have highlighted the negative impact of these sexist attitudes on various psychological and social aspects of women. However, there has been no in-depth research on the impact of ambivalent sexism in the sexual context, especially in a country like Vietnam, where gender discrimination and apprehension regarding sexual matters persist.</p> Methods <p>We investigate the prevalence of ambivalent sexism, sexual double standards, and their relationship among heterosexual Vietnamese aged 18 to 30 with sexual experience in a romantic relationship (<i>N</i> = <i>258</i>). This study utilizes the Ambivalent Sexism Inventory developed by Glick and Fiske (1996) to measure ambivalent sexism and the Sexual Double Standard Scale developed by Muehlenhard and Quackenbush (2011) to assess the sexual double standard.</p> Results <p>The results revealed that young adults in Vietnam exhibited moderate ambivalent sexism, with gender differences observed in hostile sexism. 91.1% of participants endorsed sexual double standards favoring men. Both hostile sexism and the heterosexual intimacy factor of benevolent sexism influenced sexual double standards. However, the complementary gender differentiation factor of benevolent sexism did not affect sexual double standards.</p> Conclusions <p>The study indicated that despite a relatively more egalitarian view of gender and openness about sexuality, young adults in Vietnam still possess ambivalent sexist attitudes.</p> Policy Implications <p>Addressing ambivalent sexism and sexual double standards in Vietnam requires educational reform, public awareness, workplace gender training, strengthened legal protections, and balanced gender representation in the media to promote gender equality.</p>