Portal vein can refer to:

• the hepatic portal vein, a large vein that carries blood from the digestive tract to the liver and is formed by the splenic vein and superior mesenteric vein
• a vein that is part of a portal venous system and connects two systems of capillary beds

de:Pfortader fr:Veine porte nl:Poortader ja:?? sv:Portådern