McArthur Peak is a peak in the Saint Elias Mountains of Yukon, Canada.

The peak, 13th highest in Canada, sits 11 km NE of Mount Logan, the highest mountain in Canada.

A secondary peak two kilometres to the east is known as McArthur East.

The peak was named for James Joseph McArthur, a Dominion Land Surveyor who also made the first ascent of a Canadian peak over 10,000 ft (3047 m) — Mount Stephen in 1887.

The first ascent was made in 1961 from the Hubbard Glacier up the north ridge by Barbara Lilley, Alexander McDermott, Donald Monk, Seymour Ossofsky, George Wallerstein.