The Independent Schools Association of Southern Africa is the largest and oldest association of independent (private) schools in the Southern African region.

ISASA traces its origins back to the Conference of Headmasters and Headmistresses formed in 1929, and more recently to the Independent Schools Council, which was dissolved to create ISASA in 1999.

ISASA today is a Non Profit Company (NPC), not for gain, which represents almost 700 independent schools in South Africa, Botswana, Swaziland, Namibia and Angola. Over 154,000 learners attend ISASA-affiliated schools.

ISASA's vision is of a Southern Africa in which quality education is provided to all learners, the value of independent education in contributing to this goal is recognised, and a value-based, public-spirited community of diverse, high quality independent schools is developed.

ISASA's mission is to articulate the value of independent education, to promote the common interests of its members, and to provide professional services that will enhance their contribution to education in Southern Africa.