A descriptive study was conducted to assess the effects of social networking sites on academic performance of students of selected colleges of Ahmedabad. The main objectives of the study were to assess the effects of social networking sites on the academic performance of students of selected colleges of Ahmedabad, Gujarat and to identify the association between the effects of social networking sites and selected variables like age and gender. The ‘General System Model’ adopted from Ludwig Von Bertalanaffy was used as the conceptual frame work. A quantitative approach with descriptive study design was used to achieve the objectives of the study. The samples consisted of 120 students of selected colleges of Ahmedabad. The simple random sampling technique was use to collect the sample. A Likert scale was used to assess the knowledge regarding effects of social networking sites among college students. The tool was validated by the experts. Cronbach alpha was used to establish the reliability of tools. The tool was found to be valid and reliable. Data gathered was analysed and interpreted using both descriptive and inferential statistics. The study shows that the majority were in the age group of 18-20 years. Males were 55 and females were in 65. The study showed that the majority of college students had good effects of social networking sites that is 93%. There was no significant association between effects of social networking sites and selected variables that is age and gender. Based on the findings the following recommendations were proposed for the future research: A similar study can be replicated on a large sample with the similar baseline characteristics, in more than one college of Nursing and Comparative study may be done on effects of social networking sites: In college going students and school going students and between inter states.