A state government (provincial government in Canada) is the government of a country subdivision in a federal form of government, which shares political power with the federal or national government. A state government may have some level of political autonomy, or be subject to the direct control of the federal government. This relationship may be defined by a constitution.
The reference to "state" denotes country subdivisions which are officially or widely known as "states", and should not be confused with a "sovereign state". Provinces are usually divisions of unitary states. Their governments, which are also provincial governments, are not the subject of this article.
The United States and Australia are the main examples of federal systems in which the term "state" is used for the subnational components of the federation. In addition, the Canadian provinces fulfil a similar role. The term for subnational units in non-English-speaking federal countries may also often be translated as "state", e.g. States of Germany (German Länder).
The Commonwealth of Australia is a federal nation with six states (and two mainland territories). Section 51 of the Australian Constitution sets out the division of legislative power between the states and the Commonwealth (federal) government. The Commonwealth government is given a variety of legislative powers, including control of foreign affairs, taxation (although this cannot discriminate between states or parts of states), and regulation of interstate commerce and corporations.Section 51 of the Australian Constitution at theamericanParliament website Since the original ratification of the constitution, the High Court of Australia has settled a number of disputes concerning the extent of the Commonwealth's legislative powers, some of which have been controversial and extensively criticised; these included a dispute in 1982 over whether the Commonwealth was entitled to designate land for national heritage purposes under United Nations agreements,Barwick, Sir Garfield, A View of the External Affairs Power, Samuel Griffith Society as well as numerous disputes over the extent of the Commonwealth's power over trade union and industrial relations legislation.Creighton, Breen, One Hundred Years of the Conciliation and Arbitration Power: A Province Lost?, Melbourne University Law Review
One difference between the Australian and United States models of federalism is that, in Australia, the Commonwealth Parliament has explicit constitutional power over marriage legislation; this has been a focal point for recent controversies over same-sex marriage.The High Court and the Meaning of 'Marriage' in Section 51(xxi) of the Constitution, Australian Parliamentary Library
Government structure 
Each state of Australia has a Governor, who represents the Queen of Australia (currently Elizabeth II of the United Kingdom) and performs the ceremonial duties of a head of state. Every state also has a parliament; most states have a bicameral parliament, except for Queensland, where the upper chamber (the Legislative Council) was abolished in 1922.The Legislative Council of Queensland, Queensland Parliament website Unlike their United States counterparts, Australian states have a Westminster system of parliamentary government; the head of government, known in each state as a Premier, is drawn from the state parliament.
In India, the state governments are the level of government below the central government.India is a Sovereign Socialist Secular Democratic Republic with a Parliamentary system of government. The Republic is governed in terms of the Constitution. Sovereignty is shared between the centre and the state government, but the central government is given greater powers. The President is the constitutional head of Executive of the Union. Real executive power vests in a Council of Ministers with the Prime Minister as head of government. The State resembles the federal system. In the states, the Governor is the head of Executive, but real executive power vests with the Chief Minister who heads the Council of Ministers. The judicial setup of the country is headed by the Chief justice, who presides over one of the largest judicial apparatus dispensing criminal, civil and all other forms of litigation. The government head of its legal wing is the Attorney General of India. The Prime minister is after the Governor General.
United States 
Under the 10th Amendment to the U.S. Constitution, all governmental powers not granted to the Federal government of the United States nor prohibited by it to the States, are reserved to the States respectively, or to the people.
See also