The nanostructured transition metal oxides (TMOs) have attracted considerable attention in the past decade because of their unique chemical and physical properties leading to numerous potential applications. Tungsten oxides (WO3-âˆ‚) represent a fascinating class of material used for flat panel devices, smart windows, anti glare mirrors, etc. because of its outstanding electro, photo and gas chromic properties. In particular, W18O49 has been explored for many applications such as gas sensors, photo catalysis, catalysis in electrochemical process, etc. Thus controlled production of WO3 based nanostructures in the presence of surface modulators has become significant particularly due to their flexible processing chemistry. By bearing in mind the contributions of WO3 nano dimensional materials for various applications, the present article focuses the review about the synthesis and properties of WO3 nano dimensional materials for sensor applications.