USS Donner (LSD-20) was a Casa Grande-class dock landing ship of the United States Navy, named for the Sierra Nevada's Donner Pass, where the Donner Party became snowbound in the winter of 1846–47. Donner was launched on 6 April 1945 by the Boston Navy Yard, sponsored by Mrs. W. V. Alexander, Jr.; and commissioned on 31 July 1945, Lieutenant Commander P. V. McPeake, USNR, in command.