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.

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.