Plesiohadros (meaning "near to hadrosaurids") is an extinct genus of hadrosauroid dinosaur. It is known from a partial skeleton including the skull collected at Alag Teg locality, from the Campanian Alagteeg Formation of southern Mongolia. The type species is Plesiohadros djadokhtaensis.
Plesiohadros is the only known hadrosaur from the Alagteeg Formation.