upper darby is what county in pennsylvania
Upper Darby Township, Delaware County, Pennsylvania Upper Darby Township, Delaware County, Pennsylvania. Upper Darby Township (often shortened to simply Upper Darby) is a home rule township bordering West Philadelphia in Delaware County, Pennsylvania, United States. Upper Darby is also home to the Tower Theater, a historic music venue on 69th Street built in the 1920s. Upper Darby's population is diverse, representing over 100 ethnic cultures.