South Ronaldsay is one of the Orkney Islands in Scotland. It is linked to the Orkney Mainland by the Churchill Barriers , running via Burray, Glimps Holm and Lamb Holm.

South Ronaldsay's main village is St Margaret's Hope , named after Margaret of Norway who died there. The village has a small museum and is known for its annual Boys' Ploughing Match .

The island is also known for the Neolithic Tomb of the Eagles . Ferries sail from Burwick on the island to John O'Groats on the Scottish mainland.