This study was conducted to determine the prevalence of the metabolic syndrome (MeS) and its associated factors among patients undergoing cardiac catheterization in north Jordan. A cross-sectional study was conducted among patients who underwent cardiac catheterization at King Abdullah University Hospital in north Jordan. Data from 360 patients were collected through personal interview, medical records, and anthropometric measurements. MeS was defined using National Cholesterol Education Program Adult Treatment Panel III (NCEP ATP III) and International Diabetes Federation (IDF) criteria. The prevalence of MeS among patients undergoing cardiac catheterization in north Jordan was 64.7% according to NCEP ATP III criteria and 76.7% according to IDF criteria. About 96.7% of the participants had at least 1 metabolic abnormality. Sex, body mass index, and family history of cardiovascular disease were the only variables significantly associated with MeS. The prevalence of MeS among patients undergoing cardiac catheterization in north Jordan is considerably high, especially among women.