In this chapter, we explore the emerging field of conductive paper-based substrates, emphasizing their significance in modern electronics. We begin by outlining the necessity for conductive paper in various applications, highlighting essential paper properties required for effective integration into electronic devices. A comprehensive analysis of conductive materials employed in these substrates is presented, along with a comparison of different preparation methods, assessing their impact on performance and functionality. We further delve into diverse applications of conductive paper, including its roles in electronics, optoelectronics, energy storage devices, sensors, and biosensors. By synthesizing current research and developments, we aim to provide insights into the potential of conductive paper as a versatile platform for innovative electronic solutions, paving the way for future advancements in sustainable and flexible electronics.