Constitution Hill is a suburb of Sydney in the state of New South Wales, Australia. Constitution Hill is located on a hill 28 kilometres (17 mi) west of the Sydney central business district in the local government area of the City of Parramatta and is part of the Western Sydney region. Constitution Hill overlooks the city of Parramatta from above and contains views of the inner Sydney city skyline.
The area was originally a locality within the suburb of Wentworthville. Constitution Hill was promoted from a locality to a suburb by the Geographical Names Board of New South Wales on 19 January 2007.
At the 2016 census, there were 3,966 residents in Constitution Hill. 61.0% of residents were born in Australia. The most common countries of birth were India 3.9%, China 3.8% and Lebanon 3.2%. 55.1% of people only spoke English at home. Other languages spoken at home included Arabic 7.7%, Cantonese 3.4% and Mandarin 3.2%. The most common responses for religion were Catholic 27.8%, No Religion 19.9% and Anglican 11.1%. The median weekly household income was $1,443 which was slightly below the national median of $1,486.
Constitution Hill was one of the places that was involved in the Castle Hill convict rebellion. The mostly Irish convicts would travel from Castle Hill down modern-day Old Windsor Road and meet at Constitution Hill. The distraction they had made at Castle Hill (A fire (?)) was supposed to stretch out the government forces by allocating some men to go to Castle Hill. The convicts would then attack Parramatta (The head of the colony at that time) and take over control.
The government officials had suspicion that the convicts were planning an attack on Parramatta and kept most of their forces at Parramatta, thinking that the convicts were at Toongabbie, they set out west, only to be informed that they were at Constitution Hill. When the government forces arrived at the summit of Constitution Hill (Mount Dorothy) they realised that the men had not made it that far yet and were further west at Rouse Hill.