Cities/towns in Union, New Jersey

• Berkeley Heights (2 historic properties)
• Borough of Fanwood (1 historic property)
• Clark (1 historic property)
• Cranford (2 historic properties)
• Elizabeth (11 historic properties)
• Fanwood (1 historic property)
• Hillside (2 historic properties)
• Kenilworth (1 historic property)
• Mountainside (2 historic properties)
• Murray Hill (1 historic property)
• New Providence (1 historic property)

• Plainfield (16 historic properties)
• Plainfield City (2 historic properties)
• Rahway (3 historic properties)
• Scotch Plains (5 historic properties)
• Springfield (4 historic properties)
• Summit (3 historic properties)
• Summit City (1 historic property)
• Summit Town (1 historic property)
• Union (3 historic properties)
• Westfield (4 historic properties)
• Westfield Town (1 historic property)