An understanding of trends and determinants for the residential mobility of elderly Canadians is essential for public policy and planning. Study of the patterns, changes over time, and determinants of the mobility of older Canadians has become increasingly important as the population ages. Elderly residential mobility has decreased substantially since 1971, and almost one-half of this decrease is due to changes in population composition. Because the multivariate analysis described here does not account for most of the downward trends in residential mobility, however, further work is needed on speculative explanations discussed in this article.