Mallabula is a low-lying suburb, almost at sea level.
It is bisected by Lemon Tree Passage Road, which stretches for the full length of the peninsula, from Salt Ash in the south-west, to Lemon Tree Passage.
In the northern part of the suburb is a small subdivision covering 0.5 square kilometres (0.2 sq mi) on the banks of Tanilba Bay.

The beach consists mainly of sand flats that are exposed at low tide and almost completely covered at high tide preventing the beach from being useful as either a swimming or surfing beach.
Near Rookes Point, at the mouth of Tanilba Bay, the land rises to a height of 9.1 metres (30 ft) AMSL.
At the eastern extremity of this area the land reaches a peak of 18.3 m (60 ft) in a heavily forested area.
However, between these two points and throughout the remainder of the suburb the land is generally no more than 3 m (10 ft) AMSL and is predominantly sandy.

The land south of Lemon Tree Passage Road is generally uninhabited, occupied only by a handful of homes in a single cul-de-sac and a sewage treatment plant.
Mallabula is a low-lying suburb, almost at sea level. It is bisected by Lemon Tree Passage Road, which stretches for the full length of the peninsula, from Salt Ash in the south-west, to Lemon Tree Passage. In the northern part of the suburb is a small subdivision covering 0.5 square kilometres (0.2 sq mi) on the banks of Tanilba Bay.
The beach consists mainly of sand flats that are exposed at low tide and almost completely covered at high tide preventing the beach from being useful as either a swimming or surfing beach. Near Rookes Point, at the mouth of Tanilba Bay, the land rises to a height of 9.1 metres (30 ft) AMSL. At the eastern extremity of this area the land reaches a peak of 18.3 m (60 ft) in a heavily forested area. However, between these two points and throughout the remainder of the suburb the land is generally no more than 3 m (10 ft) AMSL and is predominantly sandy.
The land south of Lemon Tree Passage Road is generally uninhabited, occupied only by a handful of homes in a single cul-de-sac and a sewage treatment plant.
Mallabula, New South Wales