Division of Corio

, the division's namesake For most of the first seven decades after Federation, it was a marginal seat that frequently changed hands between the Australian Labor Party and the conservative parties. However, Labor has held it without interruption since a 1967 by-election, and since the 1980s it has been one of Labor's safest non-metropolitan seats. Presently, the Liberal Party need a near 13 percent swing to win it. Its most prominent members have been Richard Casey, a leading Cabinet member in the 1930s and later Governor-General; John Dedman, a Chifley government minister; Hubert Opperman, a former cycling champion and a minister in the Menzies government; and Gordon Scholes, who was Speaker during the Whitlam government and a minister in the Hawke government. ==Boundaries==

Since 1984, federal electoral division boundaries in Australia have been determined at redistributions by a redistribution committee appointed by the Australian Electoral Commission. Redistributions occur for the boundaries of divisions in a particular state, and they occur every seven years, or sooner if a state's representation entitlement changes or when divisions of a state are malapportioned. When the division was proclaimed in 1900, it covered the Geelong, Bellarine Peninsula and the Surf Coast areas, and also covered areas west and north-west of Melbourne, such as , , , and . The division also extended relatively close to the City of Melbourne, stopping short of and west of the Yarra River. In 1906, with the abolition of Division of Corinella, it also included and , but lost Gisborne and Macedon to the Division of Mernda. In 1913, with the abolition of Division of Mernda, the division of Corio regained Gisborne and Macedon, and was also expanded to cover the north of Melbourne, including , , , , and . The division also began to neighbour the Division of Flinders at the Diamond Valley area (, and ). Together with Flinders, both divisions formed a ring that completely surrounded Melbourne, stretching from Surf Coast on one end to Bass Coast on the other. Also in 1913, the division also gained areas north-west of Geelong, such as , and . However, it also lost areas immediately west of the City of Melbourne, such as and . The loss of these areas were mostly reversed in 1922, and also gaining . The division also expanded towards the City of Melbourne from the north as well, stopping short of and . In 1949, the division was massively shrunk to a quarter of its area size, losing all areas outside of the Geelong, Bellarine Peninsula and the Surf Coast to the new Division of Lalor, effectively splitting the old division into Lalor and a much smaller Corio. Since then until present (), the division of Corio would only be based around these areas, occasionally gaining and losing surrounding areas in redistributions. , besides Geelong, it included , , , , , , , , , , , , , , , , , , , , , , , , , and ; and parts of , , , , , , and . ==Members==