This paper presents data from a project that aims to determine the level of knowledge and understanding of engineering students about sustainable development (SD). The data derive from a survey completed by final year engineering students in three Irish Higher Education Institutions. This paper is part of a larger study that examines the relationship between students' and teachers' understanding of SD. The results from the survey show that final year engineering students' knowledge is deficient. The majority of the participants fail to acknowledge the complexity of the concept and focus on environmental protection. Their knowledge of legislation relevant to SD and the social aspect of sustainability is particularly deficient. (Contains 3 tables and 3 figures.)