Svetac (Croatian: saint), and St. Andrew (Croatian: Saint Andrew) is a Croatian island in the Adriatic. It belongs in the Split- Dalmatia to the municipality Komiža.

Svetac is about 25 km west of Vis and is no longer inhabited for some years. Even in 1951 gave up Svetac 51 inhabitants, 2001 or a resident. The island is privately owned by the family Zanki. Svetac been inhabited for centuries and played an important role as a navigation point in the Adriatic. On the island there are remains of Byzantine buildings find. In the east, formerly existed an Illyrian settlement called Kraljicin.

The island is densely covered; the vegetation is Mediterranean. Dominant tree species are holm oak and Aleppo pine. The coastline is mostly steeply sloping. Around the island depths of 100 m can be achieved quickly. On Svetac and the upstream island Kamik nests of Eleonora's Falcon, other rare bird species.