Sociodemographic and diagnostic characteristics of 1009 patients admitted to the Psychiatry Hospital, Benghazi (Libya) in one calendar year are reported. Five hundred and four (50%) were 'first admission' cases. There were an average of 2.05 admissions for each 'readmission' case. Eighty nine percent of patients were of Libyan origin, of whom 62% were males; 66% were between 15-34 years of age, 37% were married, 28% were unemployed and 16% were in military service. ICD-9 schizophrenic psychosis was the commonest diagnosis (39%), followed by affective psychosis (17%), neurotic disorders (12%), organic psychosis (8%) and acute psychosis (7%). Neurotic depression was the commonest type of neurotic disorder and antisocial personality was the commonest among personality disorders. Relationship of sociodemographic variables with major diagnostic categories was studied in Libyan patients. Sociodemographic profiles of 'first admission' and 'readmission' cases of Libyan origin were also compared. These findings are discussed in relation to the sociocultural context.