Oregon County, Missouri

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Oregon County, Missouri
Oregon County MO Courthouse 20151021-020.jpg
Oregon County Courthouse in Alton
Map of Missouri highlighting Oregon County
Location in the U.S. state of Missouri
Map of the United States highlighting Missouri
Missouri's location in the U.S.
Founded February 14, 1845
Named for Oregon Territory
Seat Alton
Largest city Thayer
 • Total 792 sq mi (2,051 km2)
 • Land 790 sq mi (2,046 km2)
 • Water 1.7 sq mi (4 km2), 0.2%
Population (est.)
 • (2015) 10,953
 • Density 14/sq mi (5/km2)
Congressional district 8th
Time zone Central: UTC−6/−5

Oregon County is a county in the U.S. state of Missouri. It was organized in 1845 and named for the Oregon Territory. As of 2000, 10,344 people lived there. Its county seat is Alton.