The unprecedented interest of the millennial generation towards the use of social media devices (SMDs) has increasingly become a source of concern to academics in the Nigerian. A deviation from the planned academic culture, distraction and divided attention among the millennia's, occasioned by their engrossment in SMDs, necessitated this study. The study was carried out in four Nigerian universities; two federal and two state, with four research questions and five hypotheses guiding the study. The population comprised of 3,960 three hundred level (third year) students from both the federal and state universities. A stratified random sampling based on gender and individual consent was employed. The instrument used for data collection, developed by the researchers was titled "Attitude of the Millennial Generation towards Social Media Usage". The questionnaire was trial tested and the reliability coefficient for the four sections were; A = 0.80; B = 0.92, C= 0.82, D=0.84. Data were analyzed using mean, standard deviation and rank for research questions and an independent samples t-test was used to test the null hypotheses. The results showed that the millennials have a positive attitude towards the usage of SMDs for social activities but a negative attitude for using these devices for academic purposes. There is no significant difference in their attitude based on gender and WhatsApp, Instagram and Facebook were the most frequently used devices in the Nigerian universities. Some recommendations were made that the millennials should be refocused to using SMDs for academic purposes and not just social activities.