The abdominal aorta is the principal arterial conduit supplying the abdominal viscera, retroperitoneal organs, abdominal wall, and lower extremities. Although the classical branching pattern described in standard anatomical textbooks is commonly encountered, numerous variations have been documented in cadaveric, angiographic, and radiological studies. These variations arise during embryological development due to persistence, regression, or anomalous fusion of primitive ventral and lateral splanchnic arteries. Anatomical variations may involve the celiac trunk, superior mesenteric artery, inferior mesenteric artery, renal arteries, gonadal arteries, lumbar arteries, and terminal bifurcation of the aorta. Recognition of these variations has become increasingly important in modern clinical practice because of the widespread use of endovascular procedures, organ transplantation, laparoscopic surgeries, oncological resections, and interventional radiology techniques. Failure to identify anomalous vessels can result in inadvertent vascular injury, ischemic complications, hemorrhage, and unsuccessful surgical outcomes. Advances in multidetector computed tomography angiography and magnetic resonance angiography have substantially improved the detection and characterization of vascular variants before intervention. This review summarizes the embryological basis, prevalence, classification, and clinical significance of major abdominal aortic branching variations reported in the literature. Understanding these anatomical patterns is essential for anatomists, radiologists, vascular surgeons, transplant surgeons, urologists, and gastroenterologists to facilitate safe surgical planning and improve patient outcomes.