Mental health problems, such as mood disorders, are an increasing public health concern in Canada. However, few studies have examined the prevalence of, and factors associated with, mood disorders among older Canadians, particularly across diverse population groups. Using data from 2015 to 2023, the study “Mood disorders among older Canadians” fills an important gap by providing disaggregated estimates for adults aged 65 years and older. These findings can help inform targeted screening and intervention efforts for Canada’s aging population.