Background: Bladder cancer being the fifth most prevalent cancer in males and twelfth most common cancer in females because of its lethality is known to account for three percent of cancer deaths. Besides the genetic factor, one of the main cause for occurrence of bladder cancer is the environmental factor. Smoking is one the main factor associated with the bladder cancer. It is also known to be resulting in increased prevalence of muscle invasive bladder cancer. The aim of our study is to evaluate the role of smoking and smoking history on the pathological grading of bladder cancer. Material and Method: Retrospective data of 70 cases of bladder cancer was collected from January 2015 to January 2019 of the bladder cancer patients. And the data was analysed for the smoking history and the pathological grading and size of tumour on imaging. Results: Amongst smokers there was found to be a total of 88.64% cases with invasive tumours of which 76.92% cases were high grade and 23.07% were low grade tumours while 11.36% were non-invasive tumours. While amongst non-smokers 69.23% cases were of non-invasive tumours while 30.76% were invasive tumours of which 75% were low grade tumours and 25% were high grade tumours. Also there was also found to be more prevalence of large size tumours on imaging amongst the smokers in comparison to non-smokers. Conclusion: Smoking seems to be associated with worse pathological staging and large size bladder tumours.