Fassfern Scottish Gaelic: An Fasadh Feàrna
Fassfern Location within the Lochaber area
OS grid reference	NN023788
Council area	Highland
Lieutenancy area	Inverness
Country	Scotland
Sovereign state	United Kingdom
Post town	Fort William
Postcode district	PH33 7
Police	Scotland
Fire	Scottish
Ambulance	Scottish
UK Parliament	Ross, Skye and Lochaber
Scottish Parliament	Inverness East, Nairn and Lochaber
List of places UK Scotland 56°51′33″N 5°14′35″W / 56.85921°N 5.24294°W / 56.85921; -5.24294

Fassfern (Scottish Gaelic: An Fasadh Feàrna) is a hamlet on the north shore of Loch Eil in the Scottish Highlands, at the bottom of Glen Suileag and almost opposite Duisky.^[1] Historically it was spelled Fassiefern.

Clan MacPhail as part of the Clan Chattan Federation is thought to have originated in this area around the 13th century but it eventually fell under the authority of Clan Cameron territory. It is just off the A830 from Fort William to Mallaig, and about 6 miles (10 km) west of Fort William in Lochaber, and is in the Scottish council area of Highland.