This study examined the relationship between physical mobility, social integration and well-being in a subsample of 754 unmarried older community dwellers selected from Statistics Canada's 1985 General Social Survey. Also examined was the relationship of mobility; social integration with children, siblings, other relatives, and close friends; and social satisfaction with friend and family relations in predicting well-being. A cross-sectional design was used. Age, gender, marital status and living arrangements were included in the multiple regression analysis. Although no significant interactions were found between mobility and social integration, the results lend support to the importance of mobility and the quality, as opposed to the quantity, of social relationships to well-being. Mobility, satisfaction with friendships, being older and satisfaction with family relations were identified as the variables most strongly related to well-being. Research and practice implications are discussed.