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Introduction and Objectives. Bladder cancer is one of the most common malignancies in Europe. Many risk factors for bladder cancer have been identify, with tobacco smoking and exposure to environmental and occupational carcinogens being the most important ones. The objective of this study was to identify the risk factors associated with the development of bladder cancer among patients that underwent radical cystectomy. Materials and Methods. The study included 391 patients that underwent radical cystectomy from January 2017 to December 2018 in our center. According to their smoking status, patients were grouped into non-smokers (patients that didn't smoke any cigarette in the last 10 years), smokers (patients that did smoke in the last 6 months) and ex-smokers (patients that have more than 6 months and less than 10 years since they have quit smoking). Other risk factors analyzed were hereditary factors, history of external beam radiation therapy and exposure to occupational carcinogens. Results. The median age of the patients was 69 years old with 308 men (78.77%) and 83 women (21.23%) included. 170 patients were classified as smokers (43.48%), while 131 patients were ex-smokers (33.50%) and 90 patients were non-smokers (23.02%). The prevalence of occupational carcinogens exposure was 10.74%. Hereditary risk factors associated with the development of bladder cancer were identified in 17 patients (4.35%). External beam radiation therapy was identified as a risk factor in 27 patients (6.90%). Current smokers were more frequently diagnosed with T3b and T4a, while N1 and N2 lymph node stages were more often diagnosed among smokers and ex-smokers. Conclusions. Bladder cancer is a common malignancy that has a big impact on health systems and will continue to be so, due to the high prevalence of its most important risk factor, tobacco smoking. In our study, smoking was the most important risk factor, with a prevalence of 77% among patients that were classified as current smokers and ex-smokers. Prevention of smoking needs to be highlighted and cessation programs must be developed in order to lower the incidence of bladder cancer. More measures for increasing safety at work must be taken in order to decrease the exposure to occupational carcinogens. [ABSTRACT FROM AUTHOR]