This study was conducted to examine the influence of Twitter on cognitive development of Nigerian youths. Conceptual and empirical literatures were reviewed and the study was anchored on Social cognitive theory. The study adopted online survey research method (Google form) and used online Nigerian youths as respondents. A sample for the study was drawn using Morgan formula to draw a representative sample size of 384 from a population of 64,000,000 youths being the population of Nigerian youth. Availability sampling technique was adopted to administer questionnaire to respondents. Two research questions and one hypothesis were formulated to guide the proper investigation of the study. The quantitative data gathered from questionnaire were analyzed with the statistical package for social sciences (SPSS) using tables and charts to further explained the result of the findings. Findings revealed that tweeters found Twitter very engaging and useful which resulted into its everyday usage; increasing their knowledge which aided their cognitive development. The researchers concluded that there is significant positive relationship between influence of Twitter and cognitive development of youths and therefore recommended that institutions of higher learning in Nigeria should use Twitter as educational and learning tool.