- Source: List of numbered roads in Northumberland County
- List of numbered roads in Northumberland County
- Northumberland County, New Brunswick
- List of numbered roads in Waterloo Region
- List of numbered roads in Prince Edward County
- List of county roads in Ontario
- History of Northumberland
- List of numbered roads in Durham Region
- Alnwick Castle
- Morpeth, Northumberland
- B roads in Zone 1 of the Great Britain numbering scheme
This is a list of numbered roads in Northumberland County, Ontario, Canada.