Sveta Neđelja is an islet on the Adriatic Sea, in Montenegrin municipality of Budva. It is located opposite the town of Petrovac. It has a small church of the same name built upon it.
Coupled with the other islet, Katič, it makes an attraction for diving enthusiasts. As the legend has it, it was built by a seafarer who was saved from a shipwreck on this island.