Chambly, Quebec (2006 pop. 22,608 ) is southeast of Montreal.
The church was built of fieldstone in 1820 to serve the garrison of the nearby fort as well as the civilian population of Chambly. It is 50 x 30 feet with projecting circular chancel. The original high-backed pews with doors are still in use. Seating was extended to accommodate the garrison by altering the pew arrangement in 1833 and adding side galleries in 1839.
The organ was built in 1854 and modified in 1923 to an electric wind supply. The stone font was donated by the troops. In the cemetery are several crypts, including those of the Yule and Hatt families who were among the founders of Chambly. The Church was restored in 1990.
St Stephen's Anglican Church, Chambly was designated a National Historic Site of Canada in 1970.