The Dublin Simon Community Health Audit took place during a one week period from Tuesday October 27th to Monday November 2nd 2009. During this one week period the survey was conducted with representative sample of people using Dublin Simon services to provide a snapshot picture of the presenting needs and issues Dublin Simon Community work with on a daily basis. The information gathered builds up a picture of the complex nature of both homelessness and the physical/mental health needs of those experiencing homelessness. Specifically it looks at the physical health issues, diagnosed and undiagnosed; mental health issues, diagnosed and undiagnosed; and drug and alcohol use1 of those using Dublin Simon services over this one week period.