Thomas Jefferson High School is a secondary school in Northwest Dallas, Texas that serves grades 9-12. The school is part of the Dallas Independent School District and is located at 4001 Walnut Hill Lane, Dallas, Texas 75229. The school is named after the third President of the United States, Thomas Jefferson, and locally is known simply as"TJ."  The school's colors are Columbia blue and Cardinal red and its mascot is the Patriot.