Darby is located in Delaware County, PA. The population is 10,648, making Darby the 5th largest city in Delaware County.
There are 4 public schools in Darby with an average Homefacts rating of D-. The total crime rate for Darby is very low , and there are 7 registered sex offenders residing in the city. Unemployment in Darby is moderate and the median home sales price is $0. Detailed and up-to-date Darby property reports are available for any property address.