All Saints Episcopal Church, Briarcliff Manor

All Saints' Episcopal Church is a historic Episcopal church in Briarcliff Manor, New York. It was added to the National Register of Historic Places in 2002. John David Ogilby, whose summer estate and family home in Ireland were the namesakes of Briarcliff Manor, founded the church in 1848. The church was built on Ogilby's summer estate in Briarcliff Manor.

The opening service was held on December 13, 1854, and Ogilby donated the church's current building and grounds in 1863. He gave the church its first name, "All Saints' Church, Brier Cliff, Sing Sing, N. Y.", naming his property Brier Cliff after his family home in Ireland. In 1910, the church building was enlarged to the present cruciform shape, and it was consecrated on November 1, 1911. In 1945, the church purchased property to the north and east of the building; a parish hall was built there in 1949 and dedicated on January 29, 1950.

St Mary’s Episcopal Church is the oldest church in Briarcliff Manor, but it’s been closed since 2015, making All Saints the old functioning Church in the village.