This study examined the age differences in perceived preparedness for the continuation of COVID-19 pandemic; and tested the moderating effects of three types of social support, i.e., emotional, financial and instrumental support. Using a sample of 450 adults in Texas, USA from the research project ‘Vulnerability and Resilience to Disasters’ (October 2020 to January 2021), results of multiple linear regressions showed that compared with people aged over sixty-five, those aged eighteen–forty-four perceived a lower level of preparedness for the ongoing COVID-19 and there was no significant difference in perceived preparedness between individuals aged sixty-five+ and those aged forty-five–sixty-four. Receiving emotional and instrumental support was, respectively, more important for people aged sixty-five+ to perceive a better level of preparedness than for those aged eighteen–forty-four and forty-five–sixty-four. The findings highlighted the unique strengths of older adults in COVID-19 preparedness from the life course perspective and the importance of social support in their disaster preparedness. Based on these findings, social workers could incorporate the wisdom and experience of older adults into disaster management and develop age-specific interventions to promote preventive behaviours during future public health disasters.