Parkinson's disease (PD) is the second most common neurodegenerative disorder after Alzheimer's disease. Its prevalence increases with age, with the majority of cases occurring in individuals over the age of 60. Estimates of prevalence vary globally, but it is generally reported to affect around 1-2% of individuals over the age of 65. Prevalence rates tend to be higher in industrialized countries compared to developing nations. While most cases of PD are sporadic, a small percentage (~5-10%) are believed to have a genetic component. Certain genetic mutations have been linked to familial forms of Parkinson's disease, which may present at an earlier age and have a stronger family history. Parkinson's disease prevalence rates can vary across different regions and countries. Factors such as environmental exposures, lifestyle habits, and access to healthcare may contribute to these variations with some studies suggesting higher prevalence rates in certain regions, such as Europe and North America, compared to other parts of the world. Research into the epidemiology of Parkinson's disease continues to evolve, with efforts to understand regional differences and trends over time.