Saint Thomas Church is an Episcopal parish church of the Episcopal Diocese of New York at 53rd Street and Fifth Avenue in Midtown Manhattan, New York City. Also known as Saint Thomas Church Fifth Avenue or Saint Thomas Church in the City of New York, the parish was incorporated on January 9, 1824. The current structure, the congregation's fourth church, was designed by the architects Ralph Adams Cram and Bertram Grosvenor Goodhue in the French High Gothic Revival style and completed in 1914. In 2021, it reported 2,852 members, average in-person attendance of 224 and $1,152,588 in plate and pledge income.

The Episcopal Diocese of New York is a diocese of the Episcopal Church in the United States of America, encompassing three New York City boroughs and seven New York state counties. Established in 1785, it is one of the Episcopal Church's original dioceses. The current diocesan bishop is the Rt. Rev. Matthew Heyd, whose seat is at the Cathedral of Saint John the Divine.