Background: Social networking sites are an integrated component of the lives of many students, these sites have various effects on their lifestyles, especially in their academic engagement and achievement; and it encourages students to actively engage with group work. The aim of the study is to assess the impact of using social networking as learning aid on nursing students' academic engagement and achievement. Research design: a descriptive cross-sectional research design was utilized. Subjects: consisted of a representative sample (30%) of the total number of undergraduate nursing students from the 1^st, 2^nd, 3^rd, and 4^th academic years (no. =840). Setting: The study was conducted at the faculty of nursing at Minia University, Egypt. Data collection: two tools included as following: "Social networking questionnaire", and "Student academic engagement questionnaire". Results: showed that the majority (91.50%) of nursing students had a moderate level regarding social networking sites usage, more than two-thirds (67%) of them had a moderate level of student academic engagement, and more than half (51.80%) of them had very good degrees regarding student's academic achievement. Conclusion: there was a highly statistically significant correlation between SNSs usage and students' academic engagement, while there was no statistically significant correlation between students' academic achievement with SNSs usage and students' academic engagement. Recommendation:  Encourage students to use social networking sites appropriately to help them improve their academic engagement and achievement.