Abingdon is a city in Knox County, Illinois, United States, 50 miles west of Peoria. As of 2010 census, its population was 3,319, down from 3,61…Abingdon is a city in Knox County, Illinois, United States, 50 miles west of Peoria. As of 2010 census, its population was 3,319, down from 3,612 as of the 2000 census. The city was first settled in 1828. Abingdon was laid out in 1836 and named after Abingdon, Maryland, the native home of a first settler. It was incorporated in 1857.
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