This review article focuses on conducting polymers and their applications. Conducting polymers (CPs) are an
exciting new class of electronic materials, which have attracted an increasing interest since their discovery in 1977. They
have many advantages, as compared to the non-conducting polymers, which is primarily due to their electronic and optic
properties. Also, they have been used in artificial muscles, fabrication of electronic device, solar energy conversion,
rechargeable batteries, and sensors. This study comprises two main parts of investigation. The first focuses conducting
polymers (polythiophene, polyparaphenylene vinylene, polycarbazole, polyaniline, and polypyrrole). The second regards
their applications, such as Supercapacitors, Light emitting diodes (LEDs), Solar cells, Field effect transistor (FET), and
Biosensors. Both parts have been concluded and summarized with recent reviewed 233 references.