Recently, scholars have highlighted the detrimental consequences of technology-based ageism. Digital technology (DT) is commonly discoursed as an opportunity to promote Successful Aging. Nevertheless, the theoretical implications of ageism, DT, and Successful Aging are underexplored. This paper presents a new theoretical model of Digital Engagement and Ageism (D-EngAge), which elaborates on the potential impacts of ageism on DT engagement and participation in later life and explains how ageism may pose a threat to realizing the potential of DT to promote Successful Aging. The D-EngAge model was developed based on a synthesis of findings from twelve recent studies we conducted on the intersection of ageism and DT. Findings were synthesized through the four dimensions of ageism suggested by Iversen et al. (2009), demonstrating how ageism as a multi-faceted construct has a reciprocal relationship with digital engagement on the micro-(individual), meso-(social interaction), and macro-level (discourses and societal practices). Consequently, exacerbating or reducing technology-based ageism. This forum paper identifies ageism as a barrier to utilizing DT, critically discusses power imbalances, and deconstructs Successful Aging discourses regarding digital engagement. Theoretical implications and recommendations for future interventions and policy measures to mitigate ageism and promote digital engagement and participation in later life are presented.