Proper disposal of agricultural waste and polymers after use has long been one of the toughest environmental problems. Since it solves the majority of environmental issues, this has resulted in the development of commercial materials made from biodegradable and renewable sources, a focus of research around the globe. To make composites that are recyclable and degradable, natural fibres have been developed as reinforcing materials. Composite technology is a successful method to enhance the performance of insulating materials used in power system applications as part of the endeavour to optimize materials for industrial applications. The trend in the development of dielectric materials from agricultural waste (agro-waste) reinforced polymeric composites for use in electrical and electronic power systems is the main focus of this study. This article's objective is to provide a brief overview of the many kinds, best practices, and most often used biodegradable polymer matrix reinforcements in eco-composites for dielectric applications. Dielectric constants, dielectric loss factor, volume resistivity, and other properties of composites made with agro-waste as filler, at various frequencies and filler contents, with and without chemical modifications, have been discussed, as well as their prevails and prospects for the future.