NAIS requires all member schools to be accredited by one of the accrediting organizations listed on this page. These established accrediting organizations are the ones we recognize for our membership purposes due to their quality accreditation programs.
- Association of Colorado Independent Schools (ACIS) — www.acischools.org
- Association of Independent Maryland and DC Schools (AIMS) — www.aimsmddc.org
- Association of Independent Schools in New England (AISNE) — www.aisne.org
- Association of Waldorf Schools of North America (AWSNA) - www.waldorfeducation.org
- California Association of Independent Schools (CAIS/CA) — www.caisca.org
- Canadian Accredited Independent Schools (CAIS/CAN) — www.cais.ca
- Connecticut Association of Independent Schools (CAIS/CT) — www.caisct.org
- Council of International Schools (CIS) — www.cois.org
- Florida Council of Independent Schools (FCIS) — www.fcis.org
- Hawaii Association of Independent Schools (HAIS) — www.hais.org
- Independent Schools Association of the Central States (ISACS) — www.isacs.org
- Independent Schools Association of the Southwest (ISAS) — www.isasw.org
- Middle States Association of Colleges and Schools, the Commissions on Elementary and Secondary Schools (MSA-CESS) — www.msa-cess.org
- North Central Association Commission on Accreditation and School Improvement (NCA CASI), a division of Cognia — www.ncacasi.org
- New England Association of Schools and Colleges / Commission on International Education (NEASC/CIE) — cie.neasc.org
- New England Association of Schools and Colleges / Commission on Independent Schools (NEASC/CIS) — cis.neasc.org
- New Jersey Association of Independent Schools (NJAIS) — www.njais.org
- New York State Association of Independent Schools (NYSAIS) — www.nysais.org
- Northwest Accreditation Commission (NWAC), a division of Cognia — www.northwestaccreditation.org
- Northwest Association of Independent Schools (NWAIS) — www.nwais.org
- Pennsylvania Association of Independent Schools (PAIS) — www.paispa.org
- Southern Association of Independent Schools (SAIS) — www.sais.org
- Southern Association of Colleges and Schools on Accreditation and School Improvement (SACS CASI), a division of Cognia — www.sacs.org
- Southwestern Association of Episcopal Schools (SAES) — www.swaes.org
- Virginia Association of Independent Schools (VAIS) — www.vais.org
- Western Association of Schools and Colleges (WASC) — www.acswasc.org