Owing to their unique and indispensable physical, chemical, electrical/ electronic, and mechanical properties, graphene and conducting polymers have become attractive materials in all fields of science and technology. This mini-review provides a comprehensive summary on the cutting-edge sensor technologies based on graphene/ conducting polymer hybrid materials. In this article, we briefly mention the preparations and characteristics of graphene and conducting polymers. In addition, the expected synergistic effects resulting from the combination of graphene and conducting polymers as sensing media are addressed. Subsequently, an extensive and succinct summary on the impressive chemical and biological sensors using graphene/conducting polymer hybrid materials will be covered. A short introduction to the emerging sensors using the elegant nanocomposites will also be described. Finally, perspectives and challenges of graphene/conducting polymer sensors are outlooked. It is obvious that this article is important for understanding the current sensor technologies and offers essential information to the researchers in diverse fields.