Dewlish is a village and civil parish in the county of Dorset in southern England, situated in the West Dorset administrative district approximately north-east of the county town Dorchester. It is sited in the valley of the small Devil's Brook among the chalk hills of the Dorset Downs. The surrounding area is part of the Dorset Area of Outstanding Natural Beauty (AONB). In the 2011 census the parish had a population of 284.
In the 19th century the remains of two prehistoric mammoths, dating from about one million years BC, were found in the hillside above the village; two of the tusks were taken to the county museum at Dorchester.