The Williamson County Courthouse is a government building in Marion, the county seat of Williamson County, Illinois, United States. Built in 1971, it is the fourth courthouse in Marion's history. Land was registered in today's Williamson County as early as 1814, but the county itself was formed only in 1839 from the southern half of Franklin County. No co…
The Williamson County Courthouse is a government building in Marion, the county seat of Williamson County, Illinois, United States. Built in 1971, it is the fourth courthouse in Marion's history. Land was registered in today's Williamson County as early as 1814, but the county itself was formed only in 1839 from the southern half of Franklin County. No county seat was named by the organic act; instead, the original officials were responsible to ascertain a location for the seat, and they chose the location of Marion following a donation by local landowners. The city first incorporated in 1851.