A Union Alley is found in the neighborhood(s) listed below.
/PA/Montgomery_County/Pottstown_Borough/Old_Pottstown_Historic_District.html">Old Pottstown Hist Dist Pottstown Borough, PA National Register Historic District.
/PA/York_County/Wrightsville_Borough/Wrightsville_Historic_District.html">Wrightsville Hist Dist Wrightsville Borough, PA National Register Historic District.