During the twentieth century, various unsuccessful attempts were made by certain European Hindu communities to organise forums and umbrella organisations at the national level. That changed in the first decades of the twenty-first century when several such organisations were formally registered, thus providing their communities with a platform for political, social, and cultural interaction and exchange. This chapter focuses on the twelve national umbrella organisations that are members of the Hindu Forum of Europe (HFE) and the challenges they face when interacting with Europe’s secular states, which have been challenged by the growing diversity of their national religious landscapes