Millesville is a populated place LOCATED WITHIN the Borough of Donora. In turn, the Borough of Donora is located within Allegheny County.
Millesville is located at latitude 40.181 and longitude -79.868.
Since Millesville is located within the Borough of Donora, all of the census and demographic data for residents of Millesville are included as part of the information reported for Borough of Donora in the "Profile" tab above.