Various internal and external determinants influence an education system. External determinants include language, demographics, geography, technology, politics, and financial and economic trends. Religion is also one of these external determinants that can influence an education system, as well as the education systems of the. The BRICS member countries consist of Brazil, Russia, India, China, and South Africa. The BRICS member countries are one of the most organized and supportive international cooperation organizations that currently exist. Religion is considered a controversial and sensitive topic. This research aimed to determine how religion as an external determinant influences the education systems of the BRICS member countries. The study focused on the differences and similarities that can be identified based on religion as an external determinant of the various education systems in the BRICS member countries. The BRICS member countries were deliberately chosen for this study because each member state is considered a secular country in terms of religion, yet each member state treats religion differently in their country. The comparative method was used during this study to identify the best practices from the BRICS member countries. The interpretive research paradigm was used during this study using the qualitative research approach. The document analysis was used during the study to analyse the content of policies, legislation, articles, and government publications using content analysis to be able to identify themes to be able to perform the comparison between the different education systems of the BRICS member countries. The findings from this study are as follows: Religion as an external determinant of an education system does have a significant influence on the education systems of the various BRICS member countries. It is very important to observe and describe these findings from the context of the various member states. [For the complete Volume 20 proceedings, see ED622631.]