This study presents data on the factor structure, reliability, and discriminant validity of the Metamemory in Adulthood (MIA) questionnaire in a Dutch sample of 1,899 normal and healthy participants aged 24 to 86 years. The factor structure of the Dutch MIA corresponded with that of the original MIA. The Strategy scale could be divided into two subscales: External and Internal Memory Strategies. The number of items on the MIA could be reduced by 34% without loss of the factor structure or lowering of the internal consistency of the subscales. Data on the relation of the abridged MIA with age, sex, education, depression, anxiety, and subjective health are presented. The study supports the cross-national use of the MIA as a research and clinical instrument for the evaluation of subjective memory functioning.