Megget Water is a river in the Scottish Borders area of Scotland, in the former Selkirkshire. The Water rises at Broad Hill, passes through Megget Reservoir and empties into St Mary's Loch. Places in the vicinity include Cappercleuch, Craigierig, Cramalt Tower, the Glengaber Burn, Meggethead Farm.
The area is of geological and archaeological interest, through stone artifacts at Henderland in the parish of Yarrow (now in Wilton Lodge Museum, Hawick), and discoveries of gold.
- NMS (1992d), 'Megget Water (Yarrow parish):cup-marked stone', Discovery Excav Scot, page 7
- Scottish Journal of Geology (The Geological Society): R.J.Chapman, R.C.Leake, J.D,Floyd: Regional variation in gold mineralization in the vicinity of the Glengaber Burn, Scottish Borders
- Proc Soc Antiq Scot, III, 1981, 401-429, Cramalt Tower:historical survey and excavations 1977-9, Alastair M T Maxwell-Irving
- RCAHMS record of Henderland, Megget Water
- CANMORE/RCAHMS record of Boar Cleuch Flow, Megget Water
- CANMORE/RCAHMS record of Glengaber Burn, Gold Workings
- Cramalt tower:historical survey and excavations 1977-9
- Ancient Stones: The Megget Stone, near Cappercleuch
- Vision of Britain, Gazetteer entries for Peebles Shire