Background: Chronic obstructive pulmonary disease (COPD) is a leading cause of morbidity and mortality and the third leading cause of death in the US. Little is known about the impact of COPD on pts with cardiovascular disease, although it is a common coexisting condition. Methods: We used a statewide, all-payer hospital discharge database in Hawaii to identify pts discharged from 2011-13 with a primary diagnosis of acute myocardial infarction (AMI) or heart failure (HF). We compared characteristics and outcomes of pts with and without a secondary diagnosis of COPD. Multivariable logistic regression was used to assess associations between COPD and 30d readmission and inhospital mortality. Results: Overall, 6,581 pts accounted for 10,080 HF admissions and 6,520 pts accounted for 7,556 AMI admissions. COPD was noted in 11.5% of HF, 6.2% of AMI and 8.8% of pts with HF or AMI. After controlling for potential confounders, COPD was independently associated with 30d readmission for HF (OR=1.16, 95% CI: 1.00-1.33) and HF or AMI (OR=1.26, 95% CI: 1.11-1.42), with a trend for AMI alone (OR=1.19, 95% CI: 0.93-1.53). There was a trend for higher mortality with COPD for HF (OR-1.09, 95% CI: 0.80-1.50), AMI (OR=1.26, 95% CI: 0.91-1.75), and HF or AMI (OR=1.10, 95% CI: 0.87-1.37). Conclusion: Among pts hospitalized for HF or AMI, having COPD was associated with higher 30d readmission but similar inhospital mortality. As <10% were diagnosed with COPD, further work is needed to determine if it is under-reported in this population.