In the USA, universities have recently developed policies and programmes on sexual consent education. But waiting until students enroll in higher education may be too late to begin this work. To examine the extent that K-12 health education standards promote sexual consent education, we conducted a pilot study and found that only two of eighteen states explicitly mentioned sexual consent in their health education standards. Using a small sample (n = 4 states), we then identified four themes as making implicit reference to sexual consent: communication skills, decision making, personal space and interpersonal relationships. Finally, in a robust sample (n = 18 states), we conducted a content analysis of published standards regarding these themes related to sexual consent. Our analysis suggests that sexual consent is likely not discussed in sex education at K-12 schools. We recommend the more explicit inclusion of sexual consent in health education curricula via the identified themes that already exist in most or all standards, emphasising the importance of teaching young people about the nuances of sexual consent and its communication before they become sexually active.