The booklet presents results from a survey completed by 5,316 members of the National Association of Retarded Citizens. Findings are discussed for the following topics (sample findings in parentheses): membership characteristics (the two largest classes of occupations were professional/technical and homemakers, households had an annual average income of about $14,300.00); membership activity (slightly over one half of the respondents were parents of mentally retarded persons, 16% of the respondents served on committees or boards or were association officers); mentally retarded offspring (95% of those members having mentally retarded children had only one). Future plans for monitoring membership trends are discussed, and implications for membership recruitment and retention are drawn. (CL)