High-density polyethylene (HDPE) stands as a versatile thermoplastic polymer widely used across diverse industries, ranging from household appliances to automotive components and packaging. Despite its advantageous properties, such as durability and chemical resistance, HDPE faces challenges related to poor weather resistance. To overcome these limitations and enhance HDPE's performance while maintaining cost-effectiveness, various filler materials have been explored. Natural fibers like sisal, kenaf, and bagasse, among others, have been investigated for their potential as fillers to blend with HDPE, as reported in existing literature. Rice husks (RH), a byproduct of rice milling, represent a particularly abundant filler material. Incorporating RH into HDPE matrices offers an opportunity to improve its properties and widen its application spectrum. In this paper, we explore the feasibility and effectiveness of utilizing RH as a filler for enhancing HDPE's performance. Drawing upon previous studies and reviews, we analyze the impact of RH filler on HDPE properties, including mechanical strength, thermal stability, and weather resistance. Through a comprehensive examination of the literature, we highlight the potential benefits and challenges associated with RH-filled HDPE composites. Additionally, we discuss various processing techniques and formulations employed in the fabrication of RH-filled HDPE composites, aiming to optimize their performance and compatibility. By synthesizing findings from different research works, this study provides valuable insights into the utilization of RH as a sustainable filler material for enhancing the properties of HDPE and expanding its application range in diverse industrial sectors.