St. Patrick's Roman Catholic Church is a historic Roman Catholic church located near Cowansville in Sugarcreek Township, Armstrong County, Pennsylvania, USA, within the Diocese of Greensburg.

St. Patrick's was built in 1805, and is a log building measuring 22 by 35 feet (6.7 m × 10.7 m).

It has a gable roof and three windows on each side.

[3] It is the oldest Catholic church still standing in Western Pennsylvania.

[4] It was listed on the National Register of Historic Places in 1978.