Pollux (Italian: Polluce) is a mountain in the Pennine Alps on the border between Valais, Switzerland and the Aosta Valley in Italy.

The first ascent was by Jules Jacot from Geneva with guides Josef-Marie Perren and Peter Taugwalder (father) on August 1 (the Swiss national day) 1864.

The impressive north ridge was first climbed by Captain John Percy Farrar (a future President of the Alpine Club) and Wylie Lloyd with guide Josef Pollinger of St. Niklaus in the canton Valais on 18 August 1893.

Ascents are usually made from the Refuge Ottorino Mezzalama (3,036 m), the Monte Rosa hut (2,795 m); if traversing the peaks via Pollux's north ridge, PD+, the Refuge Quintino Sella au Félik (3,585 m), and the Rossi-Volante bivouac hut (3,850 m).

The first winter and ski ascent of Pollux was by Dr Alfred von Martin and Karl Planck on 7 March 1913.