Over the years, materials such as steel, jute, and wood have been commonly used for reinforcing concrete structures, enhancing their stability and mechanical properties. However, with the increasing demand for infrastructure due to population growth, there has been a corresponding rise in concrete production, leading to concerns about environmental degradation and waste accumulation. To address these issues, researchers have been exploring the use of waste materials as substitutes for traditional concrete constituents, aiming to mitigate construction pollution and reduce landfill waste. One innovative approach involves incorporating waste Human Hair Fiber (HHF) into concrete fabrication, contributing to sustainable construction practices. This study investigates the impact of HHF reinforcement on concrete strength, considering human hair lengths of 20, 50, and 80 mm at varying addition rates of 1%, 1.5%, and 2% by the weight of cement. The results indicate that a 1.5% addition of human hair, particularly lengths of 50 mm and 80 mm, demonstrates optimal compressive and flexural strength, while a 1% addition of 50 mm human hair exhibits the highest tensile strength at 28 days.