St. Anthony Catholic School is accredited by the Western Catholic Educational Association (WCEA). WCEA accredits Catholic elementary and secondary schools in nine western states (26 (arch) dioceses) and the US Territory of Guam. WCEA co-accredits and is in partnership with three Regional agencies (WASC, NAAS, NCA CASI) and two private agencies (CAIS and HAIS). WCEA began in 1957 in San Francisco and has a long and successful history of assisting school improvement through the accreditation process.

St. Anthony School is also accredited by the Western Association of Schools and Colleges. The Western Association of Schools and Colleges (WASC), a 501(c)(3) organization, is recognized as one of six regional associations that accredit public and private schools, colleges, and universities in the United States. You can visit their site for more information.

In June 2023, St. Anthony School received confirmation from WCEA and WASC that it has received a SIX-YEAR ACCREDITATION from both organizations valid through June 30, 2029.

St. Anthony School is a member of Hawaii Catholic Schools.