The City Mission Society was a social justice agency founded in 1816 by the congregations of Old South Church and Park Street Church with a mission to serve the urban poor of metropolitan Boston, Massachusetts. In 2023 it decided to close: the final service was celebrated at Old South Church which received its assets and will continue some of its programs. The archives were moved to the Congregational Library in Boston.[1]
City Mission Society had been a party to the establishment of programs serving children and families, and has helped to found several now independent schools and social service agencies.