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Madison County is a county located in the U.S. state of Illinois. According to the 2010 census, it had a population of 269,282.〔(【引用サイトリンク】url=http://quickfacts.census.gov/qfd/states/17/17119.html )〕 The county seat is Edwardsville,〔(【引用サイトリンク】accessdate=2011-06-07 )〕 and its largest city is Granite City. Madison County is part of the Metro-East region of the St. Louis, MO-IL Metropolitan Statistical Area. The pre-Columbian city of Cahokia Mounds a World Heritage Site was located near Collinsville. Edwardsville is home to Southern Illinois University Edwardsville. To the north, Alton is known for its abolitionist and American Civil War-era history. It is also the home of Southern Illinois University Dental School. ==History== Madison County was established on September 14, 1812. It was formed from parts of Randolph and St. Clair counties and named for President James Madison. At the time of its formation, Madison County included all of the modern State of Illinois north of St. Louis, as well as all of Wisconsin, part of Minnesota, and Michigan's Upper Peninsula. In the late 19th century, Madison County became an industrial region, and in the 20th century was known first for Graniteware, and later for its steel mills, oil refineries, and other heavy industries. The county had a large working population, and the county and surrounding area was a center of strength for the Democratic Party. Industrial restructuring cost many jobs and reduced the population. The county now is part of semi-rural, sparsely populated east of the St. Louis metropolitan area (nicknamed "Metro East"), as is neighboring St. Clair County. In 2009, the EPA issued an air pollution report that ranked Madison County as the county with the second-highest cancer risk in the country due to air pollution, second only to Los Angeles County, California. File:Madison County Illinois 1812.png|Madison County between its creation in 1812 and 1815, extending north to Lake Superior and the border with Rupert's Land File:Madison County Illinois 1815.png|Madison County between 1815 and 1817 File:Madison County Illinois 1817.png|Madison County between 1817 and 1821 File:Madison County Illinois 1821.png|Madison County between 1821 and 1825 File:Madison County Illinois 1825.png|Between 1825 and 1829, Madison included a northern salient that was split off to form part of Macoupin County. File:Madison County Illinois 1829.png|In 1829, Madison returned to its 1821 borders. File:Madison County Illinois 1843.png|In 1843, a small amount of land was transferred to Bond County, reducing Madison to its current size. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Madison County, Illinois」の詳細全文を読む スポンサード リンク
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