Willistown Township is a township in Chester County, Pennsylvania, United States. Willistown Township borders Easttown Township, Newtown Township, Edgmont Township, Westtown Township, East Goshen Township, East Whiteland Township, Tredyffrin Township, and the borough of Malvern. Most of Willistown Township’s addresses are in ZIP codes 19355 and 19073, with small areas in ZIP codes 19382, 19380, 19301, and 19312. Willistown Township is a part of the suburban area west of Philadelphia known as the Main Line.
The median income for a household in the township was $77,555, and the median income for a family was $93,057. This number has risen to $121,726 as per 2009 estimates. Males had a median income of $62,398 versus $39,468 for females. The per capita income for the township was $45,010. About 1.7% of families and 4.0% of the population were below the poverty line, including 3.9% of those under age 18 and 3.8% of those age 65 or over.
The township is served by Great Valley School District.