Hillsboro North Dakota Former Post Office – Guest November 25, 2023 By Doug Hillsboro, ND (old PO) ADDRESS: 121 W Caledonia Ave, Hillsboro, ND 58045 Thanks Doug Related posts: Hillsboro North Dakota Post Office – Guest Hazelton North Dakota Former Post Office – Guest Grand Forks North Dakota Post Office – Guest Bismarck North Dakota Post Office – Guest