East Sydney is a locality name for the area between the Sydney CBD and the suburb of Darlinghurst in the east. It is usually defined as the area bounded by Williams St, Forbes St, Oxford St and College St. It is in the 2010 postcode area, which also includes Darlinghurst and Surry Hills.
East Sydney was an early market garden and dairy farm site. The Australian Museum was built here in 1849 to house a collection which had begun in 1827. Other well-known landmarks in the area Sydney Grammar School (established in 1857) and the former Darlinghurst Goal (built in 1841), which is now East Sydney Technical College. Public hangings continued at the gaol up to1852.
One source says that the original name of the area was Eastern Hill; another says Henrietta Town, after the second wife of Governor Macquarie (1810-1821). A further source says the name Darlinghurst came about when local residents switched their allegiance to the wife of Governor Darling (1825-1831). Yet another source traces the name to the house Darlinghurst, built in Bayswater Road, also named in honour of Lady Darling.
Source: Sydney Suburbs - How and Why They Were Named, 1989, K. Anderson, Kangaroo Press, Kenthurst.