University of California
The Board of Admissions and Relations with schools of the University of California accredited Pomona Catholic High School in May, 1954.
Western Catholic Education Association
The Catholic accrediting Agency of California accredited Pomona Catholic through June 2024.
Western Association of Schools and Colleges
Pomona Catholic High School received full-term accreditation by the Western Association of Schools and Colleges in May, 1966, with subsequent renewals. Most recent accreditation is granted through June 2024.