The integration of beneficial microorganisms in sugarcane breeding holds promising potential to enhance crop productivity, resilience, and sustainability. This chapter delves into the diverse roles of microorganisms, from soil health improvement to plant growth promotion, within sugarcane cultivation. Microbial communities in the rhizosphere, including bacteria, fungi, and actinomycetes, influence nutrient cycling, soil structure, and plant health. Specific microbial taxa, such as nitrogen-fixing bacteria, phosphate-solubilizing organisms, and plant growth-promoting rhizobacteria (PGPR), improve nutrient accessibility, root development, and stress tolerance. By exploring the symbiotic and associative interactions between sugarcane and these microorganisms, this chapter provides insights into harnessing microbial diversity for breeding strategies aimed at improved yield and resilience. Additionally, advancements in microbial biotechnology, such as biofertilizers and biostimulants, are discussed as essential tools in sustainable sugarcane agriculture. Emphasizing the ecological and economic advantages of these microbial interventions, this chapter presents a framework for incorporating microbial insights into breeding programs that support sustainable, high-yielding sugarcane production.