Dementia is a diverse category of chronic and progressive disorder, which is commonly associated with a loss of memory, difficulty in judgment, impaired language, cognitive impairment, and various other symptoms that affect a person’s daily routine life and social life. Dementia affects about 50 million people around the globe. Dementia exists in varied forms and is associated with various neurodegenerative disorders. Alzheimer's disease is the most common form, which accords for about 60% of thecases. Abnormal agglomeration of proteins in the brain has been linked to the pathogenesis of dementia. Autophagy is a necessary protein clearance mechanism, which is dependent on lysosomes. It is a basic physiological process that performs the crucial function of maintaining protein homeostasis within the cells. The autophagic dysfunction in dementia further complicates the disease by hampering the degradation and removing abnormal pathogenic proteins. In order to understand autophagic dysfunction, it is essential to know the genetics of autophagy as well as the mutations This understanding at the genetic level helps definethe relationship between dementia and autophagic dysfunction for developing the potential remedies for the treatment of dementia.