Ardnamurchan Point (; NM 416 674) is the western extremity of the Ardnamurchan peninsula in Scotland, and the most westerly point on the island of Great Britain.

The point lies seven miles south of the island of Muck, with Eigg and Rum a few miles further north. Coll is situated nine miles to the west, and Mull is five miles south.

Near the cape there is a 36 metre tall, pink granite lighthouse built in 1849, which contains a museum called the 'Kingdom of Light' - Rioghachd na Sorcha. It is the world's only lighthouse to be built in the Egyptian style.

The nearest settlement is the small village, Achosnich .

Ardnamurchan means 'the great ocean' in Gaelic.