Marazion is a civil parish and town, on the shore of Mount's Bay in Cornwall, England, United Kingdom. It is 2 miles (3.2 km) east of Penzance and the tidal island of St Michael's Mount is half-a-mile offshore. At low water a causeway links it to the town and at high water passenger boats carry visitors between Marazion and St Michael's Mount. Marazion is a tourist resort with an active community of artists who produce and sell paintings and pottery in the town's art galleries.

Mount's Bay is a bay on the English Channel coast of Cornwall, England, stretching from the Lizard Point to Gwennap Head. In the north of the bay, near Marazion, is St Michael's Mount; the origin of name of the bay. In summer, it is a generally benign natural harbour. However, in winter, onshore gales present maritime risks, particularly for sailing ships. There are more than 150 known wrecks from the nineteenth century in the area. The eastern side of the bay centred around Marazion and St Michael's Mount was designated as a Marine Conservation Zone in January 2016.