Background/Aim: Type 2 diabetes (T2DM) is a metabolic condition associated with an increased risk of death, morbidity, and vascular problems. This study investigated the association of HIF-1α and dyslipidemia with the incidence of coronary artery disease in Saudi patients with T2DM. Patients and Methods: This study included 100 Saudi patients aged 40-60 years who were attending King Abdulaziz Specialist Hospital in Taif, as well as 50 healthy controls. All were divided into three groups of 50 subjects each: control, patients with T2DM, and patients with T2DM with coronary complications. Serum levels of HIF-1α, fasting blood glucose (FBG), glycosylated hemoglobin (HbA1c %), total cholesterol (TC), triglycerides (TG), high-density lipoprotein cholesterol (HDL-C), and low-density lipoprotein cholesterol (LDL-C) were estimated. Results: Serum HIF-1α,