Williamson County is a county located in the southern part of the state of Illinois. According to the 2010 census, it had a
population
of 66,357. Williamson County was created on
February 28, 1839. The county seat is Marion.
The county is named for Hugh Williamson (1735-1819),
delegate from North Carolina to the Philadelphia Convention.
Williamson County is included in the Carbondale-Marion, IL Metropolitan Statistical Area. It is located in an area known as Little Egypt.
The county is named for Hugh Williamson (1735-1819), delegate from North Carolina to the Philadelphia Convention.
County QuickFacts: CensusBureau Quick Facts
Williamson County was created on February 28, 1839 (Laws, 1839, p. 110) and was formed from Franklin County. Present
area, or parts of it, formerly included in: Franklin County (1818-1839), Jackson County (1816-1818), Gallatin County
(1812-1818), Johnson County (1812-1816), Randolph County (1795-1816) and Knox, Northwest Territory (1790-1801).
The county is named for Hugh Williamson (1735-1819), delegate from North
Carolina to the Philadelphia Convention. The County
Seat is Marion (1839-Present).
As reported by the Census Bureau, the county has a total area of 444 square miles (1,151 km2), of which, 423 square miles (1,097 km2) of it is land and 21 square miles (54 km2) of it (4.72%) is water.
Williamson county is located in south Illinois. Part of Tunnel Hill
State Trail is located in this county.
Bordering counties are as follows: