Jefferson County, Illinois
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Jefferson is a county in Illinois. It was formed in 1819 from the following county/ies: Edwards/White. Jefferson began keeping birth records in 1877, marriage records in 1819, and death records in 1877. It began keeping land records in 1816, probate records in 1820, and court records in 1819. For more information, contact the county at 100 S. 10th St., Mt. Vernon 62864. On the attached map, Jefferson is located at J5.
For information about the state of Illinois see Illinois Family History Research.