In this post, I document rates of risky sexual behaviors by race and sex in the United States. The data is based on surveys conducted by the CDC on nationally representative samples of high school students between 1991 and 2021. The data generally show patterns that are in line with other patterns regarding engagement in undesirable behavior: black students generally report greater rates of risky behavior than white and Hispanic students, who both report greater rates than Asian students. However, most of the racial disparities have decreased significantly in the past 10 years, leaving very small or even reversed gaps in the most recent surveys.