Abstract: Lower urinary tract symptoms (LUTS) are substantially prevalent in the elderly population. Although some studies find that there is a negative impact of smoking on LUTS. The association between LUTS and smoking is still not quantified in an accurate manner. The objective of this study was to evaluate the impact of smoking on LUTS among patients referred to the Faculty of Medicine, University of Peradeniya for uroflowmetry. LUTS were assessed by the International Prostate Symptom Score (IPSS). Smoking status and other information was collected using an interview based questionnaire. The results of this study suggested that there is an adverse impact of current and past cigarette smoking on LUTS. Therefore abstinence from smoking is beneficial to reduce the occurrence of LUTS later in life.