 PA 662 was first designated by 1930 to run from US 422 in Douglassville north to PA 562 in Amityville, while PA 562 was designated along the portion of road between Amityville and Yellow House.In the 1930s, PA 662 was extended north from Amityville to US 122 (now PA 61) in Shoemakersville.The route replaced the PA 562 designation between Amityville and Yellow House.