During the COVID-19 pandemic, new parents were disproportionately affected due to public health restrictions that changed service accessibility and increased stressors. Yet, minimal research to date has examined specific pandemic-related stressors and experiences of perinatal fathers in naturalistic anonymous settings. An important and relatively novel way parents seek connection and information is through online forum use, which increased during the social isolation of the pandemic. The current study qualitatively analyzed the experiences of perinatal fathers from September to December 2020 (792 posts, 8011 comments) through Framework Analytic Approach to identify unmet support needs during COVID-19 using the online subforum, predaddit. Five main themes emergent in the thematic framework included forum use, COVID-19, psychosocial distress, family functioning, and child health and development, each of which contained related subthemes. Findings highlight the utility of predaddit as a source of information for and interactions of fathers to inform mental health services.