Unprecedented growth in technology usage has led to the proliferation of e-commerce sites and their adoption globally. However, there are factors hindering the adoption and full exploitation of e-commerce sites in Nigeria. In view of this, this study examined users' perception of selected e-commerce sites in Nigeria, using students of the University of Ilorin as a case study. The population of the study comprised mainly of 5500 students from four faculties selected from the University of Ilorin using a simple random sampling technique. A structured questionnaire was used as the main instrument for data collection using descriptive statistics to analyze field data. A Purposive sampling technique was adopted in the selection of students for this study. The sample size comprised of 300 students selected purposively from the four Faculties. Findings revealed that the majority of users patronized e-commerce sites such as Jumia, Konga, OLX, and Jiji. However, users of e-commerce sites raised issues of privacy concerns, low-security awareness, and lack of user education. In conclusion, recommendations were made towards improving the adoption and use of e-commerce sites in Nigeria.