Southside Christian School is accredited by the Association of Christian Schools International (ACSI) and AdvancED, the unified organization of the North Central Association Commission on Accreditation and School Improvement (NCA CASI), Southern Association of Colleges and Schools Council on Accreditation and School Improvement (SACS CASI), and National Study of School Evaluation (NSSE).

The Association of Christian Schools International (ACSI)was founded in 1978 and currently serves over 5,300 member schools in approximately 100 countries with an enrollment of nearly 1.2 million students.  ACSI President Ken Smitherman stated, “I would claim that Christian schooling is not about running or hiding from--rather it is about embracing and pursuing the mind of Christ. It is about pursuing the real understanding of what it means to be salt and light, about transformation by the renewing of the mind.”

AdvancED is dedicated to advancing excellence in education through accreditation, research, and professional services. This unified organization creates the world's largest education community, representing 23,000 public and private schools and districts in 30 states and 65 countries and serving nearly 15 million students. The inclusion of NSSE brings to schools and districts greater access to NSSE's products, services, and strong research base on the factors that impact student learning. The creation of AdvancED is the beginning of a new journey in the century-long histories of NCA CASI, SACS CASI, and NSSE. Through AdvancED, NCA CASI and SACS CASI will transition from setting standards for their respective regions to establishing unified quality standards for education in a global society. In essence, the transformation is from regional accreditation to a global system of accreditation, continuous improvement, and research. NCA CASI and SACS CASI schools also share a unified, clear and powerful accreditation process designed to help schools continuously improve.