Today, social networks are major part of everyone's lives. They provide means to communicate with people across the globe with ease. As of July 2016, there are over 1.71 billion monthly active Facebook users. They generate significant amount of data, which if analysed well will provide us with valuable information. This can be done by analysing the log data collected at the respective social networking service. This chapter focuses on extraction and analysis of Facebook data since it is presently the most used social network. The result of analysis can be used in building decision support systems for an organization to help with the decision making process.