Based on the 2009 National Survey of Elderly Dependency we characterize older people who are dependent in Chile, and we compute multivariate logistic regression models to assess the factors associated with dependency. In addition to age and the presence of diseases, there are other factors that are associated with increased prevalence of dependence, such as educational level, quality of family relationships and conducting activities such as physical exercise and reading. We also characterize and describe the level of well-being of the informal caregivers of the dependent persons. Stress informal caregiver is expressed both by an increase in depressive feelings and overload, as well as by a deterioration of physical health, who also tend to be women, older, low educational levels, intensifying further vulnerability context of this group.