The First Parish Church is a historic church at 50 Church Street in Waltham, Massachusetts, whose Unitarian Universalist congregation has a history dating to c. 1696. The current meeting house was built in 1933 after a fire destroyed the previous building on the same site. It is a Classical Revival structure designed by the nationally known Boston firm of Allen & Collens. The church building was listed on the National Register of Historic Places in 1989.