Trinity Episcopal Church was founded in 1868 by returning Union soldiers, and is in its 136th year. Trinity is a landmark in the heart of downtown Ossining and is among 200 parishes of the Episcopal Diocese of New York. The Episcopal Church is a part of the worldwide Anglican Church, a fellowship within the One, Holy, Catholic and Apostolic Church, of which the Archbishop of Canterbury is the spiritual leader. 

The Parish of Trinity originally met in a Barlow Block basement and was founded by returning Union Veterans from the Village of Sing Sing. The new parish became a tenant in the original wooden structure of First Presbyterian Church, then located on the present site at 7 South Highland Avenue.

Trinity Church is noted for the richness of its traditional liturgy, the friendliness of its people and the beauty of its architecture designed by R. W. Gibson. Construction of the gray St. Lawrence County limestone building began in 1891. Parishioners enhanced the beauty of the church with memorials that include Tiffany and Gorham stained glass windows, which are some of the finest in the area.

The Westminster chimes in the bell tower struck the familiar Cambridge Quarters for many years, and were a gift in 1895.  Originally the bell tower housed the fire bell for the village of Sing Sing. The Parish Hall and the Cloister were a gift in 1905. The Reredos and High Altar, given in 1937 and 1968 respectively, were gifts from Holy Cross, an Episcopal Monastery at West Park, New York.

Today, Trinity is enjoying renewal and re-growth under the pastoral guidance of our eighth rector, The Rev. Canon Charles P. Pridemore. He is leading the parishioners to build on Trinity's liturgical roots in Anglo-Catholic worship, while proclaiming the Gospel of Christ to Ossining and the wider community. Our parish is home to people from different ethnic and cultural backgrounds, including families from Africa, the Caribbean, South America, and the fourth generation of a family from Ossining. We are single, engaged, married, widowed, gay and lesbian. Together we are a loving family known as Trinity Church, living our lives as Christ would have us live them.