Darby Township is a township in Delaware County, Pennsylvania, United States. The population was 9,264 as of the 2010 census. It is home to both residential areas and expansive industrial districts. Darby Township is home to a diverse population and its industrial districts are popular among shipping companies for its proximity to Philadelphia International Airport. It also is known for being made up of two non-contiguous geographical areas, requiring one to pass through at least two neighboring municipalities to make it from one end of Darby Township to the other.