Accreditation by the Texas Education Agency was first granted to Trinity Episcopal School in 1976. Trinity Episcopal School has maintained that accreditation and is now under the new TEA agency, Texas Private School Accreditation Commission (TEPSAC). Under that agency's guidelines, Trinity Episcopal School became fully accredited in 1989 by the Southwestern Association of Episcopal Schools. In 2001, Trinity Episcopal School became accredited by Southern Association of Colleges and Schools. Trinity Episcopal School is listed in the TEA Texas Nonpublic Schools Directory. To quote from the Directory, "Student credits earned in nonpublic schools accredited by a recognized association shall be transferable to Texas public schools. In addition, teacher service in these schools shall be creditable for salary increment purposes in Texas public schools."   Therefore, Trinity Episcopal School has enjoyed continuous accreditation since 1976 when it was first granted accreditation by TEA.

Trinity Episcopal School is licensed by the State of Texas for its Pre-K campus. The license is issued by the Department of Family and Protective Services Child Care Licensing division. The Minimum Standards for Child Care Licensing are on file in the Director’s Office on the Pre-K campus. Upon request made to the Pre-K Director, the Minimum Standards will be made available for review. The State issued license and the most current licensing review will always be posted in the front entry of the Pre-K campus for easy access to our Trinity Family. 

Trinity Episcopal School is also accredited by the Southern Association of Episcopal Schools. The Southwestern Association of Episcopal Schools (SAES) is a member in good standing of the National Association of Independent Schools (NAIS) Commission on Accreditation.  It has voluntarily agreed to abide by the Commission’s Criteria for Effective Independent School Accreditation Practices and to submit to a thorough review and evaluation of its accreditation standards, criteria, and procedures.  SAES is recognized by three state agencies and by eleven Episcopal dioceses within the six states served by the association.