ObjectiveThe aim of this study was to determine the characteristics of adults with intellectual disability who survive for more than 45 years. MethodsWe performed a cross-sectional, descriptive study of a representative sample of 189 individuals aged more than 45 years with certified intellectual disability. The subjects were randomly selected from individuals attending centres of the Autonomous Community of Galicia in Spain. The instrument used to gather information was a specifically-designed and validated questionnaire. ResultsSixty percent of subjects lived with their families, with whom 49.7% reported a good relationship. The degree of intellectual disability was moderate in 49.7% and severe in 36.5%. Aetiology was unknown in 42.5%. ConclusionsShortfalls detected in the quality of care indicate that urgent action should be taken to improve resources and the degree of specialisation among staff, as well as to aid families, who provide the main support to individuals with mental disability.