Collinsville Independent School District (Collinsville ISD, CISD) is a public school district based in Collinsville, Texas, United States. Covering 53 square miles, the district is primarily located in Grayson County, with a portion extending into Cooke County, and serves the City of Collinsville and surrounding areas.
As of 2026, Collinsville ISD operates two campuses: one combined middle-high school and one elementary school. The district most recently received a B rating from the Texas Education Agency (TEA).
Schools Collinsville Junior High/High School (grades 6–12) Collinsville Elementary (grades K-5)
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