This systematic review investigates the intersection of early-onset colorectal cancer (EOCRC), sexual functioning, and associated quality of life (QoL), aiming to understand the comprehensive impact of EOCRC on these critical dimensions. Through an extensive search across PubMed, Scopus, and Embase up until November 2023, this study synthesized evidence from the literature while adhering to PRISMA guidelines. The studies included EOCRC patients under 50 years, which examined sexual functioning and QoL using validated instruments, and were published in English. After a rigorous screening process, five relevant studies were identified from an initial pool of 2184 articles. This review includes data from five studies involving 2031 EOCRC patients. The key findings revealed a high prevalence of sexual dysfunction, with up to 50% of men experiencing impotence and 58% reporting sexual dysfunction, alongside 36% of women in some studies. Pain was described by 12% to 31% of patients. Anxiety and depression were notably prevalent, affecting up to 69% of participants. EOCRC profoundly impacts sexual functioning and QoL, with a significant prevalence of sexual dysfunction and psychological distress among affected individuals. These findings suggest the need for oncological management strategies that include not only medical treatment but also psychological support and sexual health interventions. This systematic review emphasizes the importance of holistic patient care approaches, advocating for further research and clinical attention to address the complex needs of younger EOCRC patients.