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Background: As most studies generally treat all 85+ year-olds as a homogeneous group, little is known about the specific disabilities of the oldest old population, those aged 90 and older. Objective: To estimate age-specific prevalence of disability in activities of daily living for older Canadians, including the oldest old, those aged 90 and older. Methods: Cross-sectional national survey with a representative sample of noninstitutionalized Canadians aged between 50 and 104 years old (n = 28,406). Disability was self-reported and defined as needing assistance to perform self-care and domestic life activities. Results: The prevalence of disability increased with age, and the rise appeared exponential when considering the oldest old. At age 90, the highest estimated rates of disability were reported for housekeeping (50%), shopping (45%) and transportation (44%), and 21% reported requiring …