Colleges are important providers of vocational education and training and in some countries they are the major provider. Although the international literature on colleges has grown considerably in the past two decades, it still consists primarily of qualitative descriptions of college sectors in different countries. Quantitative studies of differences in the activity mix of colleges in different countries could improve knowledge of international variation in the roles of colleges and provide a stronger foundation for study of the sources and consequences of variation in college roles. After reviewing different methodological frameworks for comparative analysis of college activity, the research reported here employs one of these frameworks to analyse differences in the activity mix of colleges in five countries. In addition to finding some noteworthy differences among the five countries, the paper also identified several problems of comparability of college data from different countries. The paper concludes that the development of internationally comparable data on colleges would require leadership by international organisations and agencies and is an undertaking well worth pursuing both for the benefits that it could bring to those whom colleges serve and for its contribution to the advancement of comparative study of vocational education and training.