Objectives: Improvement of symptoms and activities is one of the major treatment goals for patients with Chronic Obstructive Pulmonary Disease (COPD). The COPD guidelines recognise the need to address the effect of the disease on the patient’s daily life and reduce the risk of future exacerbations. This study aimed to explore the level of functional performance among patients with all stages of COPD. Methods: A cross-sectional survey design was conducted with a non-probability convenience sample of 214 patients with COPD. The sample was recruited from patients attending the respiratory outpatient clinic of one of the major teaching hospitals in Dublin, Ireland. Functional performance was measured using the Functional Performance Inventory- short form (FPI-SF). Results: The mean age was 68.1 years (SD=8.1), with the youngest participant aged 49 years and the oldest aged 90 years. Overall, over half of the participants were female (56%, n=120). Total functional performance scores ranged from 0.14 to 2.83, with a mean (SD) of 1.13(0.68), indicating that across all participant, functional performance was low. The mean subscale score was highest for the Body Care subscale, indicating that this was the domain that the participants had least difficulty with. In contrast, the mean subscale score was lowest for the Physical Exercise subscale, indicating that this was the domain that the participants didn’t partake in or had the most difficulty with. For overall functional performance, participants with mild COPD had the highest median functional performance, followed by those with moderate COPD, very severe COPD, and severe COPD. Conclusion: Knowledge about the functional performance of each stage of COPD is lacking. To the best of the author’s knowledge, this is the first study to explore the functional performance for each stage of COPD. The total functional performance score was low and suggests that management of functions in all patients with COPD such as regular vis