Using 482 homeless people at temporary shelters and on street, this study explored how both demographic and physical-health-related variables would correlate with mental health. According to the descriptive statistics, a large part of the homeless are male persons in the thirties and the forties and have had daily-based jobs before homelessness. Also, most homeless people are educated below formal high school and their homeless period is from 7 to 12 months. Results have also demonstrated that the homeless in the thirties have the highest level of anxiety, and that those who are uneducated and have been homeless for 7-12 months have the highest level of hostility. Further, homeless people who have had a history of marriage are more depressed than those who have not. Finally, it has been revealed that the homeless who have problematic behaviors concerning drinking and physical health manifest many problems on a variety of psychological dimensions.