The City of Fairfield is a local government area in the south-west of Sydney, in the state of New South Wales, Australia. The City of Fairfield is 102 square kilometres (39 sq mi). A few small areas of the original bushland remain, including examples of Cumberland Plain vegetation, which is listed under the Threatened Species Conservation Act. There are 580 parks (60 of which are major parks), including, one of the largest urban parks in the world, Western Sydney Parklands. Fairfield City is mainly residential in nature with large-scale industrial estates at Wetherill Park and Smithfield.