Although peer sexual health education is a common form of sexual health promotion for youth, systematic reviews of these programs are relatively rare. In this study we interviewed youth peer educators to inquire about their experience of program evaluation and their perception of what is needed to develop effective evaluation practices. Data were collected from eighteen participants in semi-structured qualitative interviews of youth (aged 16-28 years) sexual health peer educators in Ontario, Canada. Community-based research principles were employed throughout the project with youth involved in all stages of the research. Analysis of the data revealed four key themes relating to youth sexual health peer education evaluation: i) varied program goals; ii) benefits to peer educators; iii) diverse evaluation methods; and iv) challenges in conducting evaluation. We discuss the relevance of our findings for evaluation practices of peer sexual health education programs.