Maes Knoll (sometimes Maes tump or Maes Knoll tump) is an Iron Age hillfort located south of the English city of Bristol, at the east end of Dundry Hill and north of the village of Norton Malreward. It has a commanding view over Bristol and the Chew Valley.
The later Wansdyke runs west from it along the north side of Dundry Hill and south-east from it.
During the Second World War, a draughty, rectangular, corrugated-iron hut on the top of the tump sheltered Dundry Home Guard soldiers, allowing them to watch for enemy aircraft and potential parachute or glider invasions of Bristol. The flat plateau immediately to the east of Maes Knoll tump had perhaps 50 stone cairns to deter enemy glider landings.