What is a group of Churchgoers called?

A group of churchgoers is commonly called a Choir.

A collective noun for churchgoers could be a congregation. A congregation encompasses a group of individuals who come together in harmony and worship within a specific religious community. When used as a collective noun, it reflects the unity, shared beliefs, and a collective purpose that binds them together as a spiritual community. In a congregation, members interact, participate in religious ceremonies, share experiences, support each other, and contribute to the growth of their faith. The power of a congregation lies not only in their collective prayer and devotion, but also in their sense of belonging, fellowship, and the bonds formed with fellow churchgoers during engagements within their spiritual home. As a collective noun, "congregation" encompasses the diverse array of individuals who actively participate in church rituals, services, and various activities as a united faith-centered fellowship.