Background: Influenza is an acute respiratory infection caused by influenza virus which is highly contagious and spread easily. Objectives: The aim of this study was to evaluate the epidemiology of influenza (H1N1) type A in patients admitted to Tohid hospital, Sanandaj, Iran during 2013-2014. Material and Methods: This study was descriptive. Data were collected using a questionnaire which was designed based on study goals. The questionnaires were completed via interview, observation and performing clinical tests. After clinical confirmation of influenza by a specialist, genotype was determined by PCR. Results: Of the total 76 cases, 36 cases (48.6%) were male, mean age was 42.7 ± 16.3 and 13.5% were rural and 86.5 were urban dwellers. 52 patient (70.3%) were hospitalized and 22 (29.7%) were outpatients. Travel history was including, abroad 9.5%, domestic 16.2% and without traveling 75.3%. The average time between referring to the doctor and sampling for H1N1 was 2.7 days. The prevalence of influenza (H1N1 A) was 1.4%. Conclusion: The low incidence of H1N1 influenza type A in this study was probably due to travel to infected areas. Considering virus mutation, the readiness of health services to prevent an epidemic of this disease is essential and recommended.