The Parkinson’s association in your country may be able to provide contact details for local groups. The EPDA website contains the contact details for European Parkinson's disease organisations and international Parkinson’s organisations.
Your doctor or, depending on the country in which you live, your Parkinson’s Disease Nurse Specialist, may be able to provide contact details too. You can also ask other healthcare professionals or your local hospital if they have suggestions, and you may find it helpful to look in your local library, local newspaper, or on the internet.