- Northumberland County (Va.) Account of Expenses in Conveying British Prisoners to Richmond, 18141
- Northumberland County (Va.) Appointment of School Commissioners, 18361
- Northumberland County (Va.) Chancery Causes, 1759-1980 (bulk 1902-1950)1
- Northumberland County (Va.) Citizens' Claims of Property Lost to British Army, 18151
- Northumberland County (Va.) Commonwealth Causes, 1800, 1859-1898, 19091
- Northumberland County (Va.) Coroners' Inquisitions, 1794-18961
- Northumberland County (Va.) Declarations for Revolutionary War Pensions, 18221
- Northumberland County (Va.) Deeds, circa 1787-19211
- Northumberland County (Va.) Estate Records, 1859, 19121
- Northumberland County (Va.) Health and Medical Records, 1826-18691
- Northumberland County (Va.) Judgments (Freedom Suits), 1799, 18161
- Northumberland County (Va.) Land Records, circa 1834-19151
- Northumberland County (Va.) Military and Pension Records, circa 1785-19191
- Northumberland County (Va.) Organization Records, circa 1765-19351
- Northumberland County (Va.) Petition of Smithland Baptist Church, 19121