Cities/towns in Northumberland, Pennsylvania

• Allenwood (1 historic property)
• Augustaville (1 historic property)
• Elysburg (2 historic properties)
• Knoebel's Grove (1 historic property)
• McEwensville (1 historic property)
• Milton (5 historic properties)
• Montandon (2 historic properties)

• Northumberland (3 historic properties)
• Potts Grove (1 historic property)
• Rebuck (1 historic property)
• Sunbury (6 historic properties)
• Turbotville (2 historic properties)
• Watsontown (2 historic properties)