The present investigation examines the mechanical characteristics of coir fiber-reinforced concrete (CFRC), positing it as a sustainable substitute for traditional concrete formulations. Coir fiber, derived from the husks of coconuts, presents a renewable and environmentally sustainable material that has the potential to mitigate the ecological consequences linked to standard concrete practices. This research endeavours to ascertain the compressive, tensile, and flexural strengths of CFRC, while also facilitating a comparative analysis of these properties against those of conventional concrete mixtures. The experimental program entailed the casting of concrete specimens incorporating varying proportions of coir fiber (1, 3, and 5%) across different concrete grades (M20, M25, and M30). The results demonstrated that Coir Fiber Reinforced Concrete (CFRC) exhibited significant enhancements in particular mechanical properties, notably in terms of compressive and flexural strengths. The maximum compressive strength was attained with a 3% coir fiber inclusion in M30 grade concrete, registering a strength of 38.06 MPa after a curing period of 28 days. Similarly, the flexural strength of CFRC showed marked improvement, with the peak strength observed at a 5% coir fiber reinforcement in M30 grade concrete (2.53 MPa). These findings indicate that coir fiber contributes to enhancing crack resistance and durability in concrete, thereby rendering it a feasible alternative for sustainable construction practices. Nevertheless, the investigation also underscored several limitations. Although coir fiber reinforced concrete (CFRC) demonstrates enhancements in strength under certain conditions, an excessive proportion of coir fiber (exceeding 3%) led to diminished workability and marginal reductions in compressive strength for specific grades. Despite these obstacles, the research concludes that CFRC exhibits considerable potential as a sustainable construction material, particularly when tailored to optimize specific fiber proportions. This study offers significant insights into the feasibility of incorporating natural fibers, such as coir, into the concrete manufacturing process, thereby contributing to diminished environmental ramifications and fostering more sustainable construction methodologies.