One in Christ Episcopal Church is the1995 merger of Saint Anselm's (Park Ridge, Ill) (670.71) and a Korean mission located at Saint Mary's and then at St. Richard's (670.73) in Chicago, Ill). The Korean congregation needed a permanent church home and St. Anslem's had declining membership. The merger resulted in the new name. In 2009 One in Christ Episcopal Church moved to Prospect Heights, Ill where it still exists as a Korean congregation.

St. Anslem's existed until it merged with St. Mary's Episcopal Church (Chicago, Ill) (Korean Mission) (650.64) in 1995 to become One in Christ Episcopal Church (670.61).