New South Church (1714-1866) was a Congregational Unitarian church of the "New South Society" in Boston, Massachusetts, located on "Church Green" at the corner of Summer Street and Bedford Street. Pastors included Samuel Checkley and John Thornton Kirkland. In 1814 architect Charles Bulfinch designed a new building for the society; it was demolished in 1868. The congregation merged with the New South Free Church in 1866.