Counties in New Hampshire

• Belknap (44 historic properties)
• Carroll (44 historic properties)
• Cheshire (149 historic properties)
• Coos (26 historic properties)
• Grafton (61 historic properties)

• Hillsborough (103 historic properties)
• Merrimack (87 historic properties)
• Rockingham (115 historic properties)
• Strafford (38 historic properties)
• Sullivan (66 historic properties)