Washington Preparatory School is accredited by the following organizations:

• National Council for Private School Accreditation (NCPSA), July 1st, 2019 - June 30th, 2024
  
• Accreditation International (AI), July 1st, 2018 - June 30th, 2024
  
•  Washington State Board of Education
  
• International Baccalaureate Diploma Program (IDP), March 26th, 2020
  IB Final Authorization Letter