|Champion||Plano West A|
|Fourth||Thomas Jefferson A|
|High scorer||Alex Schmidt, Lehigh Valley|
The 2018 edition of the NAQT High School National Championship Tournament was held at the Mariott Marquis hotel in Atlanta, GA, on May 25–27, 2018. 352 teams attended, making it the largest single-site quiz bowl competition ever, beating the 304 teams record set by the 2017 HSNCT.
Plano West High School of Texas won the tournament, defeating 2-time defending champions Hunter A of New York in the finals. LASA A and Thomas Jefferson A placed 3rd and 4th respectively.