St. John's School (also known as St. John's or SJS) is a coeducational, independent K–12 day school in Houston, Texas, United States. The School was founded in 1946 and is a member of the Houston Area Independent Schools, the Independent Schools Association of the Southwest (ISAS), and the Southwest Preparatory Conference (SPC). Though situated adjacent to St. John the Divine church, St. John's claims no religious affiliation. Tuition costs ranges from ~27,000 to ~32,000 dollars per school year. As of July 2021, SJS's endowment is $80,147,000.