| Hackings Creek
|
River or creek |
| Hallstrom Point
|
Headland or point |
| Harris Creek
|
River or creek |
| Haslams Creek
|
River or creek |
| Hat Hill
|
Hill or mountain |
| Hawkesbury River (Dyarubbin)
|
River or creek |
| Hawkesbury sandstone
|
Geological feature |
| Hen and Chicken Bay
|
Bay or cove |
| Henry Head
|
Headland or point |
| Henry Lawson Cave
|
Cave |
| Hopwoods Lagoon (Taoura)
|
Lake or lagoon |
| Hornsby Plateau
|
Geological feature |
| Horse Rock Point
|
Headland or point |
| Hunts Creek
|
River or creek |
| Imperial mandarin
|
Plant |
| Iron Cove
|
Bay or cove |
| Iron Cove Creek
|
River or creek |
| Jamison Creek
|
River or creek |
| Jamison Valley
|
Valley |
| Jew Fish Bay
|
Bay or cove |
| Johnstons Bay
|
Bay or cove |
| Johnstons Creek
|
River or creek |
| Juno Point
|
Headland or point |
| Kanimbla Valley
|
Valley |
| Kedumba River
|
River or creek |
| Kelso Creek
|
River or creek |
| Kerosene Bay
|
Bay or cove |
| Kings Tableland
|
Geological feature |
| Kissing Point
|
Headland or point |
| Kittys Creek
|
River or creek |
| Kogarah Bay
|
Bay or cove |
| Kurraba Point
|
Headland or point |
| Lachlan Swamps
|
Swamp |
| Lady Bay
|
Bay or cove |
| Lake Northam
|
Dam |
| Lambert Peninsula
|
Headland or point |
| Lane Cove River
|
River or creek |
| Lapstone Hill
|
Hill or mountain |
| Leura Falls
|
River or creek |
| Lion Island
|
Island |
| Little Blue Gum Creek
|
River or creek |
| Little Sirius Cove
|
Bay or cove |
| Livistona australis
|
Plant |
| Lockleys Pylon
|
Geological feature |
| Loftus Creek
|
River or creek |
| Long Bay
|
Bay or cove |
| Long Bay, Middle Harbour
|
Bay or cove |
| Long Island
|
Island |
| Looking Glass Bay
|
Bay or cove |
| Looking Glass Point
|
Headland or point |