Stomio (Greek: Στόμιο ~ mouth, before 1927: Τσάγεζι - Tsagezi - from the turkish Çay ağzı = The mouth of river. Çay = river, ağız = mouth, ağzı = the mouth) is a town in the Larissa regional unit, Thessaly, central Greece. It was the seat of the former municipality of Evrymenes. It is situated on the Aegean Sea coast, south of the mouth of the river Pineios, and at the foot of densely vegetated Mount Ossa. It is 13 km southeast of Pyrgetos, 17 km north of Agia and 37 km northeast of Larissa. Stomio is a popular beach resort. The landmark of Stomio is the lighthouse on the beach, near the port.