Clatworthy is a village and civil parish in the West Somerset District of Somerset, England. It is situated 10 miles (16 km) from Wellington and four miles (6 km) from Wiveliscombe on the southern slopes of the Brendon Hills and close to the Exmoor National Park.The Clatworthy Reservoir is run by Wessex Water and has a capacity of 5,364,000 cubic metres, supplying some 200,000 homes. It impounds the head waters of the River Tone and the surrounding area is used for walking and fishing.