Bangalay Sand Forest of the Sydney Basin and South East Corner bioregions is the name given to the ecological community associated with coastal sand plains of marine or aeolian origin. 

This threatened community comprises Bangalay and smooth-barked apple (Eucalyptus botryoides). Swamp mahogany (Eucalyptus robusta).  The shrub layer comprises Banksia trees (Banksia serrata and Banksia integrifolia), sweet pittosporum (Pittosporum undulatum), Coast Teatree (Leptospermum laevigatum) and coffee bush (Breynia oblongiflolia). Bracken fern (Pteridium esculentum) and spiny-headed matrush (Lomandra longifolia), Pratia purpurascens and Viola hederacea dominate the ground layer with grasses and sedges.

On the Northern Beaches Bangalay Sand Forest occurs in Dee Why Lagoon Wildlife Refuge and Irrawong Reserve.