Northumberland County, New South Wales
Northumberland County was one of the original Nineteen Counties in New South Wales and is now one of the 141 Cadastral divisions of New South Wales. It included the area to the north of Broken Bay, including Lake Macquarie and Newcastle. It was bounded by the part of the Hawkesbury River to the south, the Macdonald River to the south-west, and the Hunter River to the north.
Northumberland County was named after the English Northumberland, and named by Lieutenant Charles Menzies, commandant at Newcastle, about 1804.
In 1852 it had an area of and population of 15,207, and was described as being long and wide and the main coal region of the colony.
Between 21 July 1948 and 19 December 1963, the county had a local government, the Northumberland County Council, which was abolished at the same time as the Cumberland County Council.
Parishes
Northumberland County contains the following parishes:| Parish | LGA | Coordinates | Suburbs |
| Allandale | Cessnock | ||
| Alnwick | Maitland | Beresfield, Tarro, Morpeth | |
| Auburn | Hawkesbury | ||
| Awaba | Lake Macquarie | Awaba, Coal Point, Toronto | |
| Bala | Cessnock | ||
| Belford | Singleton | Belford | |
| Blaxland | Cessnock | ||
| Branxton | Cessnock | Branxton, Greta | |
| Broke | Singleton | Broke | |
| Burragurra | Cessnock | ||
| Burton | Singleton | ||
| Cessnock | Cessnock | Cessnock, Aberdare | |
| Congewai | Cessnock | ||
| Coolamin | Cessnock | ||
| Coorumbung | Lake Macquarie | Cooranbong, Dora Creek | |
| Corrabare | Cessnock | Wollombi | |
| Cosgrove | Cessnock | ||
| Cowan | Central Coast | Mooney Mooney | |
| Dalton | Singleton | ||
| Dora | Cessnock | Martinsville | |
| Eglington | Central Coast | ||
| Ellalong | Cessnock | Ellalong | |
| Finchley | Cessnock | ||
| Gosford | Central Coast | Gosford, Narara, Niagara Park | |
| Gosforth | Maitland | Lochinvar, Rutherford, Telarah | |
| Harrowby | Singleton | ||
| Hay | Cessnock | ||
| Heddon | Cessnock | Kurri Kurri, Abermain, Heddon Greta | |
| Hexham | Newcastle | Hexham, Minmi, Shortland | |
| Kahibah | Lake Macquarie | Belmont, Cardiff, Charlestown, Glendale, Wallsend | |
| Kincumber | Central Coast | Erina, Kincumber, Terrigal | |
| Lockyer | Hawkesbury | ||
| Maitland | Maitland | Maitland, Ashtonfield, Bolwarra, Tenambit | |
| Mandolong | Lake Macquarie | Mandalong | |
| Mangrove | Central Coast | ||
| Milbrodale | Singleton | Milbrodale | |
| Millfield | Cessnock | ||
| Morisset | Lake Macquarie | Morisset, Sunshine, Wyee | |
| Moruben | Cessnock | ||
| Mulbring | Cessnock | Mulbring | |
| Munmorah | Central Coast | Gorokan, Lake Haven, Warnervale, Wyong | |
| Narara | Central Coast | Somersby | |
| Newcastle | Newcastle | Newcastle, Hamilton, Kotara, Mayfield, Waratah | |
| Olney | Central Coast | ||
| Ourimbah | Central Coast | Ourimbah | |
| Ovingham | Cessnock | ||
| Patonga | Central Coast | Woy Woy, Kariong, Patonga, Point Clare | |
| Pokolbin | Cessnock | Pokolbin | |
| Popran | Central Coast | Central Mangrove | |
| Quorrobolong | Cessnock | Quorrobolong | |
| Rothbury | Cessnock | Rothbury | |
| Rugby | Central Coast | ||
| Spencer | Central Coast | Spencer | |
| St Albans | Hawkesbury | St Albans | |
| Stanford | Cessnock | Stanford Merthyr, Kearsley | |
| Stockrington | Cessnock | Buchanan | |
| Stowe | Central Coast | Kulnura | |
| Teralba | Lake Macquarie | Cameron Park, Killingworth, Teralba, Edgeworth | |
| Tuggerah | Central Coast | Bateau Bay, The Entrance, Tuggerah | |
| Vere | Singleton | ||
| Wallambine | Hawkesbury | ||
| Wallarah | Central Coast | Budgewoi, Caves Beach, Swansea, Toukley | |
| Warkworth | Singleton | Warkworth | |
| Werong | Singleton | ||
| Whittingham | Singleton | Whittingham | |
| Wollombi | Singleton | ||
| Wyong | Central Coast | Dooralong, Jilliby | |
| Yango | Cessnock |