Thomas Jefferson High School for Science and Technology (also known as TJHSST, TJ, or Jefferson) is a Virginia state-chartered magnet high school in Fairfax County, Virginia operated by Fairfax County Public Schools. The school occupies the building of the previous Thomas Jefferson High School (constructed in 1964). A selective admissions program was initiated in 1985 through the cooperation of state and county governments, as well as corporate sponsorship from the defense and technology industries. It is one of 18 Virginia Governor's Schools, and a founding member of the National Consortium for Specialized Secondary Schools of Mathematics, Science and Technology. In 2021 and 2022, U.S. News & World Report ranked the school first in its annual "Best U.S. High Schools" list. Attendance at the school is open to students in six local jurisdictions based on academic achievement, essays, and socio-economic background. Before the 2020–21 school year, the admissions process also involved a math, reading, and science exam.