Mason County Illinois   History & Genealogy   part of the Original Illinois Trails & Genealogy Trails Project
Illinois Genealogy Trails is a not-for-profit group whose goal is to put history and genealogical information online for the free use of all researchers
The host for Mason County is Kristin Vaughn. If you would like to contribute data to this site or are interested in helping transcribe Mason County data, please Email me.
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Established January 20, 1841 Mason County was formed in 1841 from Tazewell County, and named by settlers from Mason County, Kentucky
Present area, or parts of it, formerly included in:
1827-1841: Tazewell
1825-1827: Peoria
1821-1839: Sangamon
1839-1841: Menard
1812-1821: Madison
1790-1812: St. Clair
County Seats
1841-1843: Havana
1843-1851: Bath
1851--: Havana