AIMS: Metabolic dysfunction-associated steatotic liver disease (MASLD), defined by steatotic liver disease (SLD) and cardiometabolic factors, is increasing in prevalence, but its association with heart failure (HF) is unclear. METHODS AND RESULTS: Patients with SLD without a history of HF from 2006 to 2021 were retrospectively included and were classified into MASLD and non-MASLD groups that were followed longitudinally. The primary outcome was the new development of HF, which was sub-classified by echocardiography. Multivariable and propensity score matching analyses were conducted to adjust for confounding factors. Overall, 26 676 patients with SLD were included, with a median age of 51 years and 71% classified as MASLD. During a median follow-up of 6 years, 429 (1.61%) patients developed HF, and 76% were HF with preserved ejection fraction (HFpEF). The risk of HF was significantly higher in patients with MASLD than in those without (sub-distribution hazard ratio [SHR] 2.59, 95% confidence interval [CI] 1.84-3.64) after adjustment of competing mortality. There was a dose-dependent increase in HF risks in patients with more cardiometabolic risk factors (SHR 1.12, 95% CI 1.04-1.22). MASLD was also associated with higher risk of HF-related hospitalization (SHR 2.30, 95% CI 1.31-4.04) and specifically, the risk of HFpEF (SHR 1.91, 95% CI 1.27-2.86). In propensity score-matched cohorts, MASLD was also associated with a 2.52-fold higher risk of HF. CONCLUSION: In patients with SLD, those with MASLD show a higher risk of HF, specifically HFpEF. Future studies are warranted to validate the association between HF and MASLD.