Fiber reinforced polymer Resin matrix composites have the good performance, and it is widely used in various fields to release the impact load. Over the past era of time, natural fibers have gained bursting attention than ever before from all the other research areas around the world. These natural fibers provide a plenty of advantages and strengthen than the other fibers. In this paper, we conduct a case study of the synthesis and mechanical properties of novel series of green composites including Hibiscus sabdariffa fiber as a reinforcing material in urea–formaldehyde (UF) resin based polymer matrix has been reported. Static mechanical properties of the previous randomly oriented intimately mixed Hibiscus sabdariffa fiber reinforced polymer composites such as tensile, compressive and wear properties are investigated as well. Initially urea–formaldehyde resin prepared is subjected to evaluation of its optimum mechanical properties. Then reinforcing of the resin with Hibiscus sabdariffa fiber is accomplished in three different forms: particle size, short fiber and long fiber by employing optimized resin. Proposed research reveals that mechanical properties such as tensile strength, compressive strength and wear resistance of the urea–formaldehyde resin increases to considerable extent when reinforced with the fiber. Thermal and morphological studies of the resin and bio-composites have also been conducted.