Objective: To estimate the prevalence of chronic insomnia in a population of alcoholics hospitalized in addiction clinics in Bogota. Material and Methods: Patients alcoholics hospitalized in addiction clinics were recruited. Design: observational, descriptive and cross-sectional study. Data gathered by means of clinical interviews and measuring scales: Pittsburgh Sleep Quality Index and the Zung Self-rating Anxiety and Depression scales. Results: The prevalence of chronic insomnia was 56,8%(N=33/58); anxious symptoms 65,5%(N=38/58); depressive symptoms 75,9%(N=44/58) with variations in distribution by gender. Conclusions: The prevalence of chronic insomnia measured is greater than in the general population, in accordance with previous reports of alcoholic populations elsewhere. The alcoholic patients deserve attention and medical treatment for their sleep problem in their rehabilitation plans. Further research that allows extending the obtained results is needed. Key Words: Alcoholism. Alcohol-Related Disorders. Prevalence. Sleep Initiation and Maintenance Disorders.