The Whitman Glacier is a medium-sized glacier on the eastern flank of Little Tahoma Peak, a sub-peak of Mount Rainier in Washington. Named for the missionary Marcus Whitman, it covers and contains 4.4 billion ft<sup>3</sup> (125 million m<sup>3</sup>) of ice. Starting from near the rocky spire of Little Tahoma at , the glacier flows southeast downhill. A small snowfield connects this glacier with the adjacent Fryingpan Glacier at about . As the Whitman Glacier flows southeast, the Whitman Crest bounds the glacier to the northeast. Upon reaching a flatter plateau at about , the glacier does not flow far before reaching its terminus at to . The small Ohanapecosh Glacier lies east of the terminus. Meltwater from the glacier drains into the Cowlitz River.