This is a list of State Routes in Dauphin County, Pennsylvania. State Routes in Pennsylvania are maintained by the Pennsylvania Department of Transportation. This list incorporates routes numbered between 0001 and 4999 which are either Traffic Routes (Interstate, US, or PA Routes numbered 0001 through 0999) or Quadrant Routes (State Routes numbered 1001 through 4999). For any PA Routes which were relocated after the incorporation of the Location Referencing System in 1987, the old routes were given numbers starting with 6 while the last three digits were the old route number. None exist in Dauphin County.