[3] Sugarcreek Township and most of the surrounding areas were originally settled in the early 18th century by emigrants from Ireland.

[4][5] St. Patrick's Roman Catholic Church was listed on the National Register of Historic Places in 1978.

[6] Sugar Creek Township appears in the 1876 Atlas of Armstrong County, Pennsylvania.

Its western border is the Butler County line, and it touches the Allegheny River at its northeast corner.

According to the United States Census Bureau, the township has a total area of 26.7 square miles (69.1 km2), all land.