斯旺纳奇（Swanage）是位于英格兰多塞特郡的一个海岸城市和民政教区。据2011年人口普查，斯旺纳奇有人口9,601人。

Swanage (/ˈswɒnᵻdʒ/ SWON-ij) is a coastal town and civil parish in the south east of Dorset, England. It is situated at the eastern end of the Isle of Purbeck, approximately 6¼ miles south of Poole and 25 miles (40 km) east of Dorchester. In the 2011 census the civil parish and two electoral wards had a population of 9,601. Nearby are Ballard Down and Old Harry Rocks, with Studland Bay and Poole Harbour to the north. Within the parish are Durlston Bay and Durlston Country Park to the south of the town. The parish also includes the areas of Herston, just to the west of the town, and Durlston, just to the south.