Explore details about location Northumberland County 30. Northumberland County 30 is a location situated within the Ontario alongside other areas such as Hobbs Lane, Ghislain Street, Cooks Road. Additionally, some smaller parts of Northumberland County 30 include specific areas like Chatten Road, Tee's Lane; County 26 Road, Macdonald-Cartier Freeway adding to the diversity of its landscape.