Sju or SJU may refer to: Sju Hundred, a former subdivision of Uppland, Sweden Ume Sámi, ISO 639 language code sju Luis Muñoz Marín International Airport, in Carolina, Puerto Rico, IATA airport code SJU St. Jerome's University, in Waterloo, Ontario, Canada Saint Joseph's University, in Philadelphia, Pennsylvania, U.S. Saint John's University (disambiguation), the name of several institutions Sejong University, Seoul, Republic of Korea