A census of high support community residences in Ireland was carried out on the night of the 31 March 2006. The purpose of the census was to gather information on resident in high support community residences provided by the mental health services on the night of the census. The 2006 census, the second in the series, has expanded the scope of the previous census by gathering information on diagnosis and daytime activities such as employment, attendance at day centres, and training. All residences operating under the provisions of the Mental Health Act (2001) were reviewed.