This study investigates the relationship between living arrangements (alone vs. with relatives) and the well-being and happiness of older adults (over 65), controlling for sociodemographic factors. The researchers hypothesized that living with relatives would predict better health, autonomy, social support, and consequently, higher well-being and happiness. Data from 352 participants revealed that those living with relatives exhibited significantly higher social integration, functional skills, well-being, and happiness. However, even when controlling for living arrangements, social relationships and activity levels significantly predicted well-being and happiness. The study highlights the importance of social interaction and engagement in improving the mental health of older adults regardless of their living situation.