- Source: Electoral district of Northumberland Boroughs
- Electoral district of Northumberland Boroughs
- Electoral district of Northumberland Boroughs (NSW Legislative Council)
- Electoral results for the district of Northumberland Boroughs
- Electoral district of County of Northumberland
- Northumberland County Council
- 1856 Northumberland Boroughs colonial election re-count
- Wards and electoral divisions of the United Kingdom
- 1857 Northumberland Boroughs colonial by-election
- List of areas of London
- List of boundary changes in North East England
Northumberland Boroughs was an electoral district of the Legislative Assembly in the Australian state of New South Wales from 1856 to 1859, including the towns of Morpeth, East Maitland, and West Maitland, and named after Northumberland County. It elected two members simultaneously, with voters casting two votes and the first two candidates being elected.