Askerswell civil parish extends from the A35 trunk road on Askerswell Down in the south to the Iron Age hillfort on Eggardon Hill in the northeast and Knowle Hill in the northwest. Its altitude is between about where the River Asker leaves the parish in the west up to about on Eggardon Hill. The surrounding parishes are Loders to the west, Shipton Gorge to the southwest, Chilcombe to the south, Litton Cheney to the southeast and east, West Compton to the northeast and Powerstock to the north. All of Askerswell parish is within the Dorset Area of Outstanding Natural Beauty.