The main goal of this paper is to analyze social capital in comparison with types of Facebook users. According to Robert D. Putnam, there is bridging and bonding social capital and according to several authors and researches there are several types of Facebook users. Social network sites, more specifically Facebook, was used as a potential agens of social capital where users can communicate, upload and share multimedia content, debate. The research was conducted via online survey in 2017 on a convenience sample od Croatian youth (N=178). The results indicate there are three types of Facebook users (lurkers, debaters and entertainers). Furthermore, there is positive correlation between lurkers and debaters types of users and online activism. Users with higher bonding social capital use Facebook more than 4 hours a day and those with higher bridging social capital use Facebook more than 6 hours a day. The results also indicate there is no statistically significant difference between online activism and age. So far, the research that indicates correlation between social capital and types of Facebook users has been unknown which is why the data gathered in the research presented in this paper is of grate value.