Cities/towns in Mercer, Ohio

• Burketsville (1 historic property)
• Carthagena (2 historic properties)
• Cassella (2 historic properties)
• Celina (5 historic properties)
• Celinda (1 historic property)
• Chickasaw (1 historic property)
• Coldwater (1 historic property)
• Cranberry Prairie (1 historic property)
• Fort Recovery (2 historic properties)
• Maria Stein (3 historic properties)

• Mendon (1 historic property)
• Philothea (1 historic property)
• Sharpsburg (1 historic property)
• St. Anthony (1 historic property)
• St. Henry (1 historic property)
• St. Joe (1 historic property)
• St. Peter (1 historic property)
• St. Rose (1 historic property)
• St. Sebastian (1 historic property)
• Wendelin (1 historic property)