Cities/towns in Delaware, Ohio

• Ashley (5 historic properties)
• Delaware (32 historic properties)
• Galena (3 historic properties)
• Harlem (1 historic property)
• Olive Green (1 historic property)
• Orange Township (1 historic property)
• Ostrander (1 historic property)

• Powell (2 historic properties)
• Radnor (4 historic properties)
• Shawnee Hills (1 historic property)
• Sunbury (3 historic properties)
• Westerville (1 historic property)
• Worthington (1 historic property)