South Perrott is a village and civil parish in northwest Dorset, England, 2 miles (3.2 km) southeast of Crewkerne. In 2012 the estimated population of the parish was 220. Figures from the 2011 census have been published for South Perrott parish combined with the neighbouring parish of Chedington; the population in these areas was 367.
The name Perrott comes from the River Parrett.
Immediately south of the church are some earthworks, the remains of the moated enclosures of Mohun Castle. A geophysical survey of this site was undertaken in 1996.