Dewlish is a village and civil parish in the county of Dorset in southern England, and is situated approximately 7 miles north-east of the county town Dorchester. The village is sited in the valley of the small Devil's Brook among the chalk hills of the Dorset Downs; the parish covers about 2,100 acres and extends west to include part of the valley of the small Cheselbourne stream, and east to include a dry valley at Dennet's Bottom.