Rapid population growth has necessitated a significant increase in infrastructure, especially highrise structures, and the complexities of these constructions have highlighted the importance of the soil beneath the foundation. To get the greatest outcomes, several ways of stabilizing soil beneath the foundation have been used and refined over time. The most successful and long-term solution to these procedures is the use of waste material as a reinforcing agent for soil stabilization. The present study is based on the findings of an experimentalstudy on the combined effect of human hair fibers (HHF) and fly ash (FA) on increasing the strength and deformation characteristics of the clayey soil of Patna, India. The outcomes of the experiment are encouraging in terms of determining the suitability of locally available waste materials such as HHFs and FA to replace conventional and commercial fibers. It is found that employing these waste products in soil stabilization is not only beneficial but also saves money on the treatment of the waste product. This also avoids concerns aboutproper dumping and disposal of one of the most abundant wastes i.e., human hair. In comparison to virgin clay, the CBR value is improved by 77 percent when the clay is reinforced with 20% FA and 2% HHF. The positive outcomes of combining these two locally available waste materials, especially for CBR, can be used to improve the properties of untreated clay and be considered an economical and long-term subgrade material.