The Otemma Glacier () is a long glacier (2005) situated in the Pennine Alps in the canton of Valais in Switzerland. In 1973 it had a length of , and an area of but, like most other alpine glaciers, is known to be receding. By 2010 it had receded a further from its 1973 position. In summer 2018, the snout zone (terminus) of the glacier collapsed.
