Objective To examine the relationship between coping strategies and the change in symptom severity in contamination-focused OCD patients during the COVID-19 pandemic over a one-year follow-up. Methods In March 2020, a one-year follow-up study was initiated with 56 contamination-focused OCD patients in Turkey. Coping strategies were evaluated using the COPE scale. OCD symptom severity was assessed using the Yale-Brown Obsessive-Compulsive Scale (Y-BOCS) at the beginning and end of the year. The Fear of COVID-19 Scale was administered mid-year. Results One year post the onset of COVID-19, 68% of patients showed increased OCD symptom severity, while 32% displayed a decrease. Higher scores on the fear of COVID-19 scale and lower acceptance scores from COPE subscales were correlated with increased OCD symptom severity. Conclusions The COVID-19 pandemic has intensified OCD symptoms in a substantial proportion of patients, particularly those with heightened fears related to the pandemic, and reduced acceptance-based coping strategies. Tailored interventions emphasising adaptive coping mechanisms may benefit OCD patients in managing their symptoms during external stressors like pandemics.