Although available studies each operationalize congregational participation in different ways, attendance at religious services is usually quite prevalent. For example, in his analyses of multiple waves of the National Survey of Children's Health, Whitehead (2018) found that 68% of children with autism spectrum disorder and 74% of children with intellectual disability attended religious services at least annually. Likewise, Carter et al. (2015) analyzed data from the National Core Indicators project that addressed the religious participation of more than 12,000 adults with IDD who were receiving services from state agencies. Almost half (48%) of these adults had attended a religious service at least once in the past month and 35% attended three or more times per month. However, whenever congregational participation rates among individuals with and without disabilities are compared, a sizable participation gap has been documented (Brucker, 2015; National Organization on Disability, 2010;Whitehead, 2018). In every comparative study, individuals with IDD are substantially less involved. None of these studies addressed the specific religious traditions (e.g., Christianity, Judaism, Islam, Hinduism) with which individuals with IDD affiliated.