Loch Lochy

Infobox lake
lake_name = Loch Lochy
image_lake = Loch Lochy.jpg
caption_lake = View from the A82
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location = Lochaber, Highland, Scotland
coords = coord|56|58|07|N|4|54|38|W|region:GB_type:waterbody|display=inline,title
type = freshwater loch
inflow =
outflow = River Lochy
catchment =
basin_countries = United Kingdom
length = 15 km
width =
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Loch Lochy (Scottish Gaelic, "Loch Lochaidh") is a large freshwater loch in Lochaber, Highland, Scotland.

Located 16 kilometers southwest of Loch Ness along the Great Glen, the loch is over 15 kilometers long with an average width of about 1 kilometer. The River Lochy flows from its southwestern end while the Caledonian Canal links its northwestern extent to Loch Oich.

It is where the Battle of the Shirts took place involving Clan Donald and Clan Fraser.

Lizzie, a three-humped, plesiosaur-like creature akin to the Loch Ness monster, is reputed to live in the waters of Lochy.