Piako was a New Zealand parliamentary electorate established in 1946 and disestablished in 2008. It was last held by Lindsay Tisch MP from 2002 to 2008. Population centres The 1941 New Zealand census had been postponed due to World War II, so the 1946 electoral redistribution had to take ten years of population growth and movements into account. The North Island gained a further two electorates from the South Island due to faster population growth. The abolition of the country quota through the Electoral Amendment Act, 1945 reduced the number and increased the size of rural electorates. None of the existing electorates remained unchanged, 27 electorates were abolished, eight former electorates were re-established, and 19 electorates were created for the first time, including Piako. The First Labour Government was defeated in the and the incoming National Government changed the Electoral Act, with the electoral quota once again based on total population as opposed to qualified electors, and the tolerance was increased to 7.5% of the electoral quota. There was no adjustments in the number of electorates between the South and North Islands, but the law changes resulted in boundary adjustments to almost every electorate through the 1952 electoral redistribution; only five electorates were unaltered. Five electorates were reconstituted and one was newly created, and a corresponding six electorates were abolished (including Piako); all of these in the North Island. These changes took effect with the . After years of political tension, the National Government came to an agreement with the Labour Party on the redistribution provisions of the electoral law. This resulted in the 1956 Electoral Act, which significantly changed the composition of the Representation Commission; since then, there has been one member representing the government, and one the opposition, apart from all the official members. Tolerance to the electoral quota was reduced again to 5%. The 1957 electoral redistribution made an adjustments in the number of electorates between the South and North Islands, with in the South Island abolished and Piako in the North Island reconstituted. Combined with significant population redistributions within the islands, the boundaries of all but two electorates were altered. These changes took effect with the . The electorate included the population centres of Matamata, Cambridge, Morrinsville, Te Aroha, Waharoa, Waitoa, Huntly, Ngāruawāhia, and Ohaupo. History Piako was a rural Waikato electorate from 1946 to 1954, then from 1957 to 1978, when it was renamed .