Summary:  Numerous large-scale surveys in the United States and Europe suggest steady generational declines in religiosity and religious social participation, with visible shifts from one cohort to the next (Idler, 2022). And yet, research considering the secularization of society has largely ignored age and ageing as important points of inquiry (Idler, 2021). Similarly, beliefs in science and religion-science compatibility have rarely been investigated from a gerontological perspective, despite the long-standing concepts of gerotranscendence (Tornstam, 1997) and contemplative ageing (Sherman, 2010). Indeed, the increasing salience of one’s own mortality may enhance religious and/or spiritual concerns among older adults, alongside practical implications of mounting biomedical needs and care considerations. Given a rapidly growing ageing population (WHO, 2022), the need for inquiry into this topic has never been greater. Thus, our guiding research question is “How do older adults understand their own (non)religious and/or spiritual identities and beliefs in science within an increasingly secular society?” More specifically, we will examine older adults’ perceptions of compatibility among their (non)religious and scientific identities and belief systems, with implications for coping with health ailments (e.g., acute, chronic, pandemic-related) and care choices (e.g., vaccinations, end-of-life care). To achieve these aims, this project will entail a large online survey as well as interviews with Canadian older adults. Importantly, previous research concerning secularization of believe may not translate adequately to the Canadian context, here multiculturalism (encompassing race, ethnicity, culture, and religion) is official federal policy (Government of Canada, 2022), and where the largest age gap in religiosity between younger and older adults has been found across 41 countries (Pew Research Center, 2018). By taking both a quantitative and qualitative approach, we will engage with both aggregate and personal   levels of analysis, disseminating our findings to academic outlets and community stakeholders. Specifically, project-related outputs will include: two academic articles, two conference presentations, a general audience target        article in The Conversation, a plain language summary, and a webinar presentation for an older adult audience. In keeping with the  aims of the INSBS, it is expected that these outputs will impact older adults’  and community stakeholders’ perceptions of the relations between (non) religion and/or spirituality and science, as well as engage with academic and societal dialogue regarding the importance of addressing older adults’ life (and death) choices regarding spiritual care in health and medicine.