Oral contraceptive pills because of their availability and reversibility they are most extensively used from of contraception globally. Unfortunately issues with compliance which is linked to knowledge of proper use and the frequency of adverse events restrict their effectiveness. When women begin taking the pill for the first time they may experience prescription adverse effects. These negative effects normally fade after a few months. Title: “A study to assess the knowledge regarding side effects of oral contraceptive pills among married women using oral contraceptive pills residing in selected areas of Pune city Objective: To assess the side effects of oral contraceptive pills among married women. To associate the findings with selected demographic variables. Materials and Methods: The study adopted Non-experimental Descriptive design carried on 200 women and was conducted in selected areas of Pune city. Non probability sampling technique was used and was statistically analyzed after collecting the data through structured questionnaires regarding knowledge on side effects of oral contraceptive pills used for the data collection. Self structured questionnaire was used. Ethical clearance was taken from institutional ethics committee. Data analysis was done using descriptive statistics. Results: The present study result showed that knowledge concerning side effects of oral contraceptive pills among the married women Majority 80% were having good knowledge, 17% were having average knowledge and 3% were having poor knowledge. The study recommended that married women are aware about the side effects of oral contraceptives pills, there is need for giving new current knowledge in forms of health education, media, and information at health settings