This report highlights the sexual and reproductive health findings from the Youth19 Rangatahi Smart Survey (Youth19). It is designed to be read with the Youth19 Rangatahi Smart Survey, Initial Findings: Introduction and Methods report (Fleming, Peiris-John et al., 2020), which explains how the survey was conducted, who was included and how to interpret the results. The prevalence estimates for 2001, 2007, 2012 and 2019 are national estimates (i.e., the data reported has been calibrated to adjust for differences between the national population of students and those who took part in the surveys, as outlined in the Introduction and Methods report). We have highlighted in the text where there are significant differences between groups, however, when confidence intervals overlap, differences are within the margin of error and are not statistically significant. While it may appear that there are differences between groups, if the confidence interval intervals overlap we will highlight that there are no substantial differences. The Introduction and Methods report and other Youth19 outputs are available at www.youth19.ac.nz.