Major depressive disorder (MDD) is a widespread mental health disorder that has significant worldwide consequences, as it is the second most significant factor contributing to years lived with disability. This chapter examines the subtle correlation between depression and kidney failure, highlighting the difficulties caused by the intricate interaction of physical and emotional well-being. The prevalence of depression in persons receiving hemodialysis varies from 19% to 60%, leading to noncompliance with therapy and affecting overall results. The incidence of depression in individuals with renal disease varies depending on the stage, with rates as high as 76.5% observed in transplant patients. This chapter explores the extensive diagnostic methods that incorporate clinical interviews and proven screening instruments to identify the overlap between depressed symptoms and signs of renal failure. The symptoms include emotional, cognitive, behavioral, and physiological elements, which collectively lead to a reduced quality of life. The influence of depression on health-related quality of life (HRQOL) is substantial, since reduced levels of anxiety and depression are linked to enhanced HRQOL. Interventions, such as exercise programs and adaptive coping strategies, demonstrate potential in improving health-related quality of life (HRQOL). The COVID-19 pandemic has heightened stress factors, impacting the degree of depression and the health-related quality of life related to mental health. Ultimately, this chapter emphasizes the significance of comprehending and tackling depression in patients with kidney failure for the purpose of comprehensive healthcare provision. The complex correlation between depression and quality of life emphasizes the necessity for customized interventions and continuous research to enhance diagnostic instruments, hence enhancing mental health assistance for this susceptible demographic.