This report describes the methodology and sample characteristics of Mayo's Older African Americans Normative Studies (MOAANS). These studies reflect a multidisciplinary, collaborative effort by investigators at Mayo Clinic to provide age-appropriate normative data for African American elders on commonly used neuropsychological tests. A sample of 309 community-dwelling individuals over age 55 contributed to the MOAANS sample. Norms were calculated for midpoint age groups, based on percentile scores derived from cumulative frequencies of raw test scores. Demographic, medical, and sociocultural data were also collected, and are summarized to assist clinicians in making determinations regarding the appropriateness of these norms for individual patients. In most cases, the use of MOAANS norms should improve diagnostic accuracy in dementia evaluations of African American elders.