St. John's Episcopal School is accredited through the Southwestern Association of Episcopal Schools (SAES) which holds St. John's to a "state accreditation level or better" concerning the education of its students.
Recognition of Accredited Status as per SAES:
Accreditation with SAES is recognized by the state education agencies in Texas.
Oklahoma Private School Accreditation Commissions (OPSAC); and New Mexico.
It is also recognized by the National Association of Independent Schools (NAIS)
SAES is the only denominational accrediting association so recognized. Additionally, SAES accreditation is recognized by eleven Episcopal dioceses within the six states served by SAES.