In the last decade, online learning has become a trendy topic. Rapid technology advancements urge the education community to continue to innovate with internet-based learning. Religious education, which is critical in forming students' personalities, is being challenged to continue adapting their learning techniques amid the COVID-19 pandemic, which pushes learning to take place at home. This study aims to identify the amount of advancement of research on online learning in religious education courses. This study used the Rapid Review approach, which involves conducting a fast review of previous studies. This study uses 13 articles from search results. This study finds four major themes in research on online learning in religious education: learning methods used in the online learning process, obstacles encountered in the online learning process, evaluations conducted in the online learning process, and student, teacher, and parent perspectives on the online learning process.