Smithfield is a suburb of Sydney, in the state of New South Wales, Australia. Smithfield is located west of the Sydney central business district, in the local government areas of the City of Fairfield and Cumberland Council. Located in the Greater Western Sydney region, the suburb is one of the largest in Fairfield City by area. Established in 1836, Smithfield was the first major settlement of the Fairfield LGA. The original 1838 summary plan of Smithfield shows the suburb laid out in a grid pattern with most of the streets having the same names as they do today. Its altitude ranges from above sea level. Geologically, the suburb sits on the Cumberland Plain. The suburb is a mix of residential, industrial and commercial areas, but is mostly characterized by low-density housing. Located partially in the suburb, the Smithfield-Wetherill Park Industrial Estate is the largest industrial estate in the southern hemisphere and is the centre of manufacturing and distribution in greater western Sydney. Smithfield West is a locality within the suburb and it is an unofficial designation for the region westwards from Dublin Street to the boundary of Wetherill Park. History Aboriginal people from the Cabrogal tribe, a sub-group of the Gandangara tribe, have lived in the Fairfield area for over 30,000 years. White settlement began in the area in the early 19th century. Smithfield was originally known as Chilsholm's Bush. In 1803, homeless children were becoming a problem after convicts turned their children out into the streets. As a consequence, Governor Philip Gidley King, put aside a large area of for a Male Orphan School. By 1836, some of this land was offered for sale by the colonial government of the time. John Ryan Brenan (1798–1868), an attorney who was appointed Police Magistrate in 1836, bought here. Early settlers were attracted to Smithfield by its good soil, dependable water supply and easy access to the Colony's established towns. Some of the best farming land was in the district to the west and southwest of the Smithfield area. In 1867, Smithfield was a semi-rural settlement populated by vine growers, gardeners, wood timber cutters, orchards and tanneries. Brenan planned to make money with a meat market and a cattle sale yard. He subdivided the estate and named it Smithfield after the meat markets of London and Dublin. Saleyards opened in 1841 but the project to establish a village around the yards failed.