Polypyrrole (PPy)‐based hybrid nanocomposites of organic and inorganic hybrid materials are not restricted for academic research, but nowadays, they are useful to design innovative industrial applications such as fuel cell, solar cell, catalysts, sensors, energy, and medical applications. In recent applications, PPy and its hybrid composites have been emerged as promising sensors due to their unique physical and chemical properties. In this article, the role of PPy‐based hybrid nanocomposites for the improvement in sensing applications has been discussed in detail. Along with this is the systematic discussion of the synthesis techniques of PPy sensory hybrid nanocomposites that provides a better understanding of this research area. Finally, certain limitations of PPy and its hybrid nanocomposites‐based sensor are also discussed for sensing.

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Polypyrrole with different morphologies has great impact over its properties such as concentration, time, high surface to volume ratio, dopants etc based on morphology has been discussed in this review. These Polypyrrole are potentially used for the sensing of various gases such as NO2, NH3, CO, H2 and CH4 gases. The influence of surface morphology, and doping of various PPy structures on gas sensing performance are extensively explained in this article such as roughness of films of PPy due to nature of counter ions influence the response of PPy films when used as sensitive layer, nanosheet structures has lowest LOD and improved response/recovery times. Furthermore, article focused upon various morphologies of PPy obtained with different methods and its influence in sensitivity is explained in this article. The sensitivity and response of PPy to various gases are also reviewed.