The emergence of social media has sparked a lot of interest in academic libraries especially in the area of adoption. However, there appears to be limited knowledge on whether librarians’ generation differs in the adoption levels of social media specifically in the Southwestern, Nigeria. In a bid to carrying out this focus, this study adopted the descriptive survey design. The population comprised seventy-nine (79) librarians from eight academic libraries. The total enumeration sampling technique was used to study all respondents for the study. A self-structured questionnaire was the instrument used for data collection. Data gathered were analysed using descriptive (frequency, percentage & mean) and inferential statistics (ANOVA). The results indicate that there is a significant difference between the generations (Baby boomers, Generation X, Generation Y, Generation Z) with respect to their adoption of social media, but that no significant differences were found between the generations and social media adoption for library services. The study concluded by noting that social media can be adopted by librarians across different generations. Library administrators should acknowledge these differences and formulate their social media strategy accordingly when designing plans on social media in Southwestern, Nigeria.