Calvary Church is an Episcopal church located at 277 Park Avenue South on the corner of East 21st Street in the Gramercy Park neighborhood of Manhattan, New York City, on the border of the Flatiron District. It was designed by James Renwick Jr., the architect who designed St. Patrick's Cathedral and Grace Church, and was completed in 1848. The church complex is located within the Gramercy Park Historic District and Extension. It is one of the two sanctuaries of the Calvary-St. George's Parish.