Middle Schools in Williamson County, Illinois There are 3 Middle Schools in Williamson County, Illinois http://schooltree.org/ Thu, 26 Nov 2009 05:18:31 +0700 FeedCreator 1.7.2 http://schooltree.org/images/schoollogo.gif SchoolTree.org logo http://schooltree.org/ Information provided by SchoolTree.org. Click to visit. http://illinois.schooltree.org/middle/Williamson-County-Schools.xml Carterville Intermediate School http://illinois.schooltree.org/public/Carterville-Intermediate-025505.html 5th Grade to 8th Grade :: 544 Students :: Carterville C U School District 5 SchoolTree.org Herrin Middle School http://illinois.schooltree.org/public/Herrin-Middle-027031.html 6th Grade to 8th Grade :: 492 Students :: Herrin C U School District 4 SchoolTree.org Marion Junior High School http://illinois.schooltree.org/public/Marion-Junior-High-027466.html 5th Grade to 8th Grade :: 864 Students :: Marion Community Unit School District 2 SchoolTree.org