In 2011-12, specialist homelessness services assisted almost 230,000 clients, representing 1 in 98 Australians. Of these clients, 56% were at risk of homelessness, 44% were already homeless and 11% were sleeping without shelter or in improvised or inadequate shelter when they first began receiving support. Agencies provided more than 7,000,000 nights of accommodation in 2011-12 and assisted 84% of clients at risk of homelessness to sustain their tenancy. This report presents the findings of the Specialist Homelessness Services Collection for 2011-12, and describes the clients of specialist homelessness agencies, the assistance they sought and were provided, and outcomes achieved for clients.