High Schools in Clay County, Texas There are 2 High Schools in Clay County, Texas http://schooltree.org/ Tue, 18 Nov 2008 10:45:00 +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://texas.schooltree.org/high/Clay-County-Schools.xml Henrietta High School http://texas.schooltree.org/public/Henrietta-High-084046.html 9th Grade to 12th Grade :: 323 Students :: Henrietta Independent School District (ISD) SchoolTree.org Petrolia High School http://texas.schooltree.org/public/Petrolia-High-086364.html 9th Grade to 12th Grade :: 141 Students :: Petrolia Independent School District (ISD) SchoolTree.org