Aim. The aim of this study is to analyse the social and national background of families with patients with anorexia nervosa in Lithuania. Material and methods. The target group consists of 39 patients (and their families) with anorexia nervosa aged from 11 to 18 treated within a period of 15 months in four largest towns of Lithuania, where mental health treatment facilities for children and adolescents are in place. The main methods are clinical psychiatric examinations, a questionnaire drafted by the author of the study and aimed to assemble data on the cultural and social background of patients and their families, and a statistical data analysis. Results. The results of the study, including the data on national identities of anorectic patients and their parents, as well as statistical information on mixed families in the target group, place of residence, and higher education of the parents and the grandparents of the patients are presented in the paper. Conclusions. The presentation of data is followed by a discussion. The author makes several conclusions, which are presented in the paper. The most important and interesting of them are that children from mixed families are at a higher risk of developing anorexia nervosa and that there is an overrepresentation of parents with higher education in the Lithuanian anorectic families.