This review provides an overview of electrochromic organic and polymeric materials, focusing on their types, applications, and chemical classes. Electrochromic materials exhibit reversible color changes upon reduction or oxidation, which can be controlled by applying an appropriate electrode potential. The main classes of electrochromic materials include transition metal coordination complexes, viologen systems, and conducting polymers. These materials are used in various applications such as anti-glare car mirrors, electrochromic displays, and smart windows. The review also discusses experimental methods for studying electrochromic materials, including electrochemical techniques and spectroscopic measurements. Specific examples of electrochromic polymers based on transition metal coordination complexes, viologen systems, and conducting polymers are detailed, highlighting their unique properties and potential for commercial use. The review concludes with a discussion on functionalized electrochromic polymers and composites, emphasizing their potential in advanced electrochromic devices.This review provides an overview of electrochromic organic and polymeric materials, focusing on their types, applications, and chemical classes. Electrochromic materials exhibit reversible color changes upon reduction or oxidation, which can be controlled by applying an appropriate electrode potential. The main classes of electrochromic materials include transition metal coordination complexes, viologen systems, and conducting polymers. These materials are used in various applications such as anti-glare car mirrors, electrochromic displays, and smart windows. The review also discusses experimental methods for studying electrochromic materials, including electrochemical techniques and spectroscopic measurements. Specific examples of electrochromic polymers based on transition metal coordination complexes, viologen systems, and conducting polymers are detailed, highlighting their unique properties and potential for commercial use. The review concludes with a discussion on functionalized electrochromic polymers and composites, emphasizing their potential in advanced electrochromic devices.