Welcome to The Alzheimer Society of Ireland Internet site 33, 000 people in the Republic of Ireland have dementia, most of whom have Alzheimer's Disease. The Alzheimer Society of Ireland supports people with dementia, their families and carers.Contact Information Alzheimer House, 43 Northumberland Ave., Dun Laoghaire, Co. Dublin. Phone: 01 2846616, Fax: 01 2846030, Email:alzheim@iol.ie ...