Curtisville is a census-designated place (CDP) in West Deer Township, Pennsylvania, United States.

[5] According to the United States Census Bureau, the CDP has a total area of 1.4 square miles (3.6 km2), all land.

At the 2000 census, there were 1,173 people, 498 households, and 330 families living in the CDP.

There were 528 housing units at an average density of 370.2 per square mile (142.9/km2).

29.7% of households were made up of individuals, and 13.9% were one person aged 65 or older.