Objective: Psychiatric units in general hospitals are becoming a key feature of Irish psychiatric practice. This is in accordance with national policy as laid down in “Planning for the Future” in 1984. To date these units have not been the subject of much research. This paper presents baseline data, gives some clinical impressions of how these units are operating, and discusses the implications of these findings. Method: Questionnaires were sent to the medical directors of all 12 psychiatric units in general hospitals in Ireland. In addition, statistical data was collected from the Health Research Board and from the Mental Health Services Section of the Department of Health. Results: All the questionnaires were returned and the results showed that these units were operating in a largely self sufficient way with little usage of local psychiatric hospitals. Outside Dublin 35% of all Health Board admissions are now going to such units, a figure comparable to England and Wales. There was little evidence of patient selectivity as units seemed to be treating the full range of psychiatric disorders. Conclusion: The picture given of general hospital units in Ireland is, in the main, very encouraging. The main problems encountered were the management of disturbed patients and the heavy demands of liaison psychiatry and these two areas would need to be further researched.