This report presents data on ageism from two sources. Firstly, a module of questions on this theme was included in the 2003 Northern Ireland Life and Times Survey. Secondly, a stand-alone survey was conducted in the Republic of Ireland at the same time as the work in the North was being undertaken. It can be noted that, whilst some small-scale qualitative work has been conducted in Northern Ireland in recent years (Evason and Whittington, 2003), this is the first attempt to address this topic via large-scale quantitative surveys with representative samples of adults from both Northern Ireland and the Republic. It therefore constitutes a significant addition to our understanding of what has become an increasingly important field of inquiry.