Purpose: This study was done to identify differences in health habits, perceived stress, depression, and suicidal thinking by gender for elderly people who are living alone and elderly people who are living with others. Method: The study participants were 4,051 people aged 65 years and over who were surveyed in the Third Korea National Health and Nutrition Examination Survey in 2005. The relationship among outcomes and living arrangement by gender in elders was assessed using multiple logistic regression while controlling for sociodemographic characteristics. Results: Older men living alone were less likely to have breakfast and more likely to perceive stress and think of suicide than older men living with family or others. On the other hand, older women who live alone were less likely to perceive stress than older women who live with others. Age, educational level, income, and number of diseases were significantly associated with each individual outcome. Conclusion: This study showed that living alone has a significant impact on physical health habits and psychological health of elderly people, especially for older men. Therefore, living arrangement should be considered in developing a health promotion program for elders as well as age, gender, education, and income.