This report highlights the emotional and mental 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, which explains how the survey was conducted, who was included and how to interpret the results. This document and other Youth19 outputs are available at www.youth19.ac.nz. As part of Youth19, secondary school students answered questions about their emotional and mental health. In this report we present an overview of findings and changes over time in areas of emotional and mental health, first for the total population (all students combined) and then for Māori, Pacific, Asian, and Pākehā and other European groups. Finally, we highlight ways to support mental wellbeing for young people.