Sackville North is a suburb of Sydney, in the state of New South Wales, Australia 80 kilometres north-west of the Sydney central business district in the local government area of The Hills Shire.

Brewongle Environmental Education Centre on Chapel Hill Road is a NSW government run school.

It is set in sclerophyll forest which is part of the Hawkesbury Valley system.

This setting offers unique opportunity for children to study many different ecosystems and how humans have interacted with them, from the Dreamtime to the present.

There are some other historic dwellings and remains from early settlement along Mud Island Road adjacent to the Sackville Reach section of the Hawkesbury.