Founded in 1817, St. Thomas Episcopal Church is the oldest congregation in Mamaroneck. The church has been very active in the community ever since, offering numerous outreach programs and sponsoring several educational initiatives, including Sunday School for children during services.
The current church was built in 1886, and the St. Thomas complex stands as the only example of contiguous 19th century architecture in Mamaroneck. The church has also operated a thrift shop since 1928.
St. Thomas Episcopal Church is led by Pastor Deborah Tammearu and Deacon Lynn Werdal.