Sant Llorenç des Cardassar is a small municipality on Mallorca, one of the Balearic Islands in Spain. It lies in the Balearic Islands region, in the western Mediterranean.
As a municipality, it covers the town of the same name together with the surrounding area of the island's interior and east. Mallorca is the largest of the Balearic Islands, and the municipality forms part of its administrative structure.
It is one of the smaller municipalities on the island, distinct from the larger and better-known resorts and cities of Mallorca.