High Quality Content by WIKIPEDIA articles! Wallacia is a suburb of Sydney, in the state of New South Wales, Australia. Wallacia is located 68 kilometres west of the Sydney central business district, in the local government areas of the City of Penrith and Wollondilly Shire. It is part of the Greater Western Sydney region.Originally the region was called Riverview, but later became known locally as Wallace after Robert Wallace who grazed cattle on the 2,000 acres (8.1 km2) that he rented from Sir Charles Nicholson. His house became the unofficial Post Office from November 1885, situated at the rear of what is now the Wallacia Store and Newsagents. By 1897, a school built in the area was known as Wallace School. When the Post Office became official in November 1905, the G.P.O. named the area Boondah, as the name Wallace was already in use elsewhere in New South Wales. However, local people objected and to retain the link with Wallace, they suggested that the area be called Wallacia. This name was officially approved on 1 June, 1906.