Trinity Parish is located on the northern side of the intersection of Center Street and Homer Street, just before downtown Newton Center. On street parking is available on Homer Street, on the next block of Center Street just before Bow Street, and on Furber Lane behind the church.

The main entrances to the church are on Center Street and Homer Street, with a ramp entry on Center Street. After the Sunday Service there is a coffee hour in the Dunbar room of the old parish hall, which has ramp access from the church. The church offices are also in the old parish hall, at 11 Homer Street, and are open from 8 AM-12 Noon, Monday to Thursday.

Trinity Parish of Newton Center is part of the Diocese of Massachusetts, the largest Episcopal Diocese in the United States. Our Diocesan Bishop is the Right Rev. M. Thomas Shaw, SSJE, who is assisted by the Right Rev. Roy F. (Bud) Cederholm Jr., and by the Right Rev. Gayle Elizabeth Harris. The Diocese is divided into twelve deaneries, and Trinity Parish is one of fifteen parishes in the Charles River Deanery.