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Background: Of the neurodegenerative diseases, Parkinson's disease is recognised to have the fastest growing prevalence. It is unclear whether this is due to the ageing global population alone, with several environmental factors increasingly implicated in changing prevalence rates. Large data sets have been used nationally and globally to help predict future disease burden. However, the reliability of such sources is yet unknown for Parkinson's disease., Summary: This review discusses the methods used in all published UK prevalence studies conducted to date. Direct comparison between prevalence figures obtained from the 10 to discussed prevalence studies is precluded due to differences in methodology for case ascertainment and diagnosis. Age adjusted estimates vary from 105/100,000 to 168/100,000., Key Messages: These studies demonstrate no overall trend in changing prevalence figures between 1961 and 2007. No difference in prevalence trends were seen for those living in rural or urban areas. Differences between ethnic groups, for example, remains an under explored area., Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (Copyright © 2024 The Authors. Published by Elsevier Ltd.. All rights reserved.)