Counties in Pennsylvania

• Adams (32 historic properties)
• Allegheny (212 historic properties)
• Armstrong (14 historic properties)
• Beaver (19 historic properties)
• Bedford (29 historic properties)
• Berks (133 historic properties)
• Blair (29 historic properties)
• Bradford (14 historic properties)
• Bucks (160 historic properties)
• Butler (10 historic properties)
• Cambria (28 historic properties)
• Carbon (11 historic properties)
• Centre (62 historic properties)
• Chester (313 historic properties)
• Clarion (4 historic properties)
• Clearfield (20 historic properties)
• Clinton (10 historic properties)
• Columbia (28 historic properties)
• Crawford (19 historic properties)
• Cumberland (33 historic properties)
• Dauphin (70 historic properties)
• Delaware (85 historic properties)
• Elk (10 historic properties)
• Erie (42 historic properties)
• Fayette (68 historic properties)
• Forest (4 historic properties)
• Franklin (62 historic properties)
• Fulton (7 historic properties)
• Greene (41 historic properties)
• Huntingdon (42 historic properties)
• Indiana (23 historic properties)
• Jefferson (14 historic properties)
• Juniata (7 historic properties)

• Lackawanna (31 historic properties)
• Lancaster (208 historic properties)
• Lawrence (9 historic properties)
• Lebanon (28 historic properties)
• Lehigh (53 historic properties)
• Luzerne (32 historic properties)
• Lycoming (19 historic properties)
• McKean (10 historic properties)
• Mercer (15 historic properties)
• Mifflin (9 historic properties)
• Monroe (19 historic properties)
• Montgomery (145 historic properties)
• Montour (6 historic properties)
• Northampton (50 historic properties)
• Northumberland (28 historic properties)
• Perry (19 historic properties)
• Philadelphia (541 historic properties)
• Pike (27 historic properties)
• Potter (5 historic properties)
• Schuylkill (18 historic properties)
• Snyder (6 historic properties)
• Somerset (32 historic properties)
• Sullivan (7 historic properties)
• Susquehanna (7 historic properties)
• Tioga (8 historic properties)
• Union (17 historic properties)
• Venango (19 historic properties)
• Warren (10 historic properties)
• Washington (95 historic properties)
• Wayne (16 historic properties)
• Westmoreland (49 historic properties)
• Wyoming (5 historic properties)
• York (94 historic properties)