Lovejoy High School is a public high school in Lucas, Texas, in south-central Collin County. It is the only high school in the Lovejoy Independent School District and is classified as 5A by the University Interscholastic League (UIL). The school serves most of the cities of Lucas and Fairview, as well as a small portion of Allen. Students from outside the district may transfer to Lovejoy High School for a tuition fee. Until the Fall of 2006, all high school students zoned in Lovejoy ISD attended nearby Allen High School. Lovejoy graduated its first senior class in 2010. In 2022, the school was given an Accountability Rating Summary of 98 by the Texas Education Agency, including Distinction Designations in all seven categories.