St Michael's is linked to a number of local and national bodies.

Within the Church of England, Amersham is part of the Diocese of Oxford and the Amersham Deanery.

COTHA (Churches-on-the-Hill in Amersham) works within the covenant signed by representatives of Amersham Free Church, St John's Methodist Church and St Michael's. There is close liaison between the ministers of the three churches and the congregations meet to worship together twice each year.