 At their most basic, logic is the study of consequence, and information is a commodity. Given this, the interrelationship between logic and information will centre on the informational consequences of logical actions or operations conceived broadly. The explicit inclusion of the notion of information as an object of logical study is a recent development. It was by the beginning of the present century that a sizable body of existing technical and philosophical work (with precursors that can be traced back to the 1930s) coalesced into the new emerging field of logic and information (see Dunn 2001). This entry is organised thematically, rather than chronologically. We survey major logical approaches to the study of information, as well as informational understandings of logics themselves. We proceed via three interrelated and complementary stances: information-as-range, information-as-correlation, and information-as-code. 