Abstract Recent advancements in sensor technology are driven by progress in materials science and increasing demands from applications such as health diagnostics. Particularly, with the push from nanotechnology and biocompatible materials, sensor technology has made significant progress. Sensor applications have been greatly enhanced by the unique properties of transition metal dichalcogenides (TMDs). These high‐performance sensors not only improve the accuracy of measurements but also provide robust support for real‐time data analysis. To further demonstrate the latest advancements in sensor technology, this paper specifically introduces the recent researches of sensors based on WS 2 , MoS 2 , and their composites. Herein, the structures and the properties of TMDs are systematically described, highlighting their strong potential for advancing sensor development. Then, the recent progress of Group VI TMDs in various sensor domains, including humidity sensors, temperature sensors, gas sensors, biosensors, image sensors, and strain sensors, is further discussed. Through detailed analysis of the function and performance of Group VI TMDs in these areas, this paper aims to emphasize their advantages as sensor materials. The performance of TMDs in various sensor applications is also systematically summarized, and a glimpse into what the future holds for sensors using TMDs is offered.