This study sought to investigate the association between nativity status and Hispanic young women's formal sex education and parental sex education in the USA. We used data from a cross-sectional sample of 310 Hispanic young women aged 18-24 years old from the 2013-2015 US National Survey of Family Growth. We assessed 11 outcomes: four formal sex education topics; receiving any formal sex education; a formal sex education scale; four parental sex education topics; and receiving any parental sex education. The majority of our sample was US-born Hispanic versus foreign born (72.6% and 27.4% respectively). Foreign-born Hispanics were less likely to have received any type of formal sex education than US-born Hispanics (adjusted odds ratio = 0.81; 95% confidence interval: 0.24, 0.68, p < 0.01). Foreign-born Hispanics were less likely to have received parental HIV sex education than U.S.-born Hispanics (aOR = 0.36; 95% CI: 0.14, 0.97, p < 0.05). Nativity status did not have a significant effect on each unit increase on the scale (aB = -0.07, SE = 0.16; aß = -0.42, p > 0.05). Our results indicate that having appropriate sex education knowledge is better than not being cognisant. Future studies should however examine the quality and content of sex education programmes so policymakers can better understand these young women's sexual behaviours and decisions.