Chettle is a small village and civil parish in the county of Dorset in southern England. It lies within the North Dorset administrative district, 6 miles (9.7 km) north-east of the town of Blandford Forum. It is sited at the head of a gently-sloping valley on the dip slope of the chalk formation called Cranborne Chase. The A354 trunk road crosses the valley about 1 km to the south. In 2013 the estimated population of the civil parish was 90.