The Chatham Chorale, founded in 1970 by Marjorie Bennett Morley and Dr. E. Robert Harned, draws its one hundred auditioned singers from almost every Cape Cod town. For its first seventeen years of membership, repertoire and reputation grew under the inspired and dedicated leadership of Ms. Morley. In 1987 Margaret T. Bossi became Music Director. Her musical vision, unflagging energy, and infectious humor have created a remarkable synergy between director and performer.

Noted for its diverse musical programming, The Chorale has sung many great choral works and collaborated in performances with the Cape Symphony Orchestra, the Paul Winter Consort, the Cape Repertory Theatre, Theresa Thomasson's Gospel Singers, and local church and young people's choirs. Additionally, it funds an annual scholarship for local students pursuing a musical education.

The Chamber Singers of The Chatham Chorale are a select group of thirty-four voices under the direction of Ms. Bossi. They perform three formal concerts a year in addition to numerous community service appearances. They have performed a live radio broadcast on WGBH-FM radio with Robert J. Lurtsema.