Online learning is a form of virtual education that encompasses a range of technologies such as email, video conferencing, etc., and various applications such as Google Meet, Zoom, Google Classrooms, etc., which use the internet and gadgets to access it to impart education without involving people physically going somewhere. However, online learning is inseparable from a number of physical and financial challenges which compel both students and teachers to refrain from participating in online learning. This study, entitled "A Study of Challenges Faced in Online Learning by Secondary School Students," categorizes various challenges faced by students during online learning. This research is a descriptive study. Data was obtained through a questionnaire developed by the researcher, which consists of closed-ended as well as open-ended questions. The population for the present study consists of secondary school students of Aligarh district in U.P. The sample for the study comprised 60 secondary school students selected using a convenience sampling technique. The results obtained indicate that students agreed that they were facing various physical and financial challenges in online learning, which created hindrances in participating effectively.