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Yuma County is a county located in the southwestern corner of the U.S. state of Arizona. As of the 2010 census, its population was 195,751.〔(【引用サイトリンク】url=http://quickfacts.census.gov/qfd/states/04/04027.html )〕 The county seat is Yuma.〔(【引用サイトリンク】accessdate=2011-06-07 )〕 Yuma County comprises the Yuma, AZ Metropolitan Statistical Area. The county borders the Colorado River to the southwest, with three other states across the river: California and the Mexican states of Baja California and Sonora. ==History== Yuma County was the one of four original Arizona Counties created by the 1st Arizona Territorial Legislature. The county territory was defined as being west of longitude 113° 20' and south of the Bill Williams River. Its original boundaries remained the same until 1982, when La Paz County was created from its northern half. The original county seat was the city of La Paz until 1871 when it was moved to Arizona City, later renamed Yuma in 1873〔Walker, Henry (1986). "Historical Atlas of Arizona", p.32. University of Oklahoma Press, Norman. ISBN 978-0-8061-2024-9〕 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「Yuma County, Arizona」の詳細全文を読む スポンサード リンク
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