Geo quick facts: Jefferson County is a county located in the U.S. state of Oregon. As of the 2010 census, the population was 21,720. The county seat is Madras. The county is named after Mount Jefferson – Wikipedia.
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Geo quick facts: Jefferson County is a county located in the U.S. state of Oregon. As of the 2010 census, the population was 21,720. The county seat is Madras. The county is named after Mount Jefferson – Wikipedia.
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