Map showing Magnesia within Greece

The Pagasetic Gulf () is a rounded gulf in the prefecture of Magnesia (east central Greece) that is formed by the Mt. Pelion peninsula. It is connected with the Euboic Sea . The passage in to the Euboic Sea is narrow and is about 4 km.

Its main port is Volos.

Places within the gulf

In clockwise order:

• Alos, W, no port
• Almyros, W, no port
• Pagasae, NW, no port
• Demetrius, NW
• Iolkos, NW
• Nea Ionia, N, small port
• Volos, N
• Agria , NE, beach with no port
• Argalasti, SE, no port but has a beach
• Trikeri , S, no port and a beach

The gulf took its name from the ancient city of Pagasae.