Lower Portland is a rural suburb near Sydney, in the state of New South Wales, Australia.

Lower Portland is a peaceful hamlet located at the junction of the Colo and Hawkesbury rivers.

They were divided into a number of different 'clans', whose quick demise upon European settlement has resulted in very little information remaining on how the local area was utilised.

The area situated on the banks of the Hawkesbury River below the junction with the Colo River was given the name Portland Place by Governor Hunter when it was first settled in 1799 by convicts who were engaged in clearing timber and building a stock yard, i.e. a paddock at Portland Place that enclosed thirty acres.

The name was first used in 1805, and almost certainly seems associated with the story that a rock on the plateau above the headland resembled the Duke of Portland.