Harold Byrd Mountains () is a group of exposed mountains and nunataks which extend in an east-west direction between the lower part of Leverett Glacier and the head of the Ross Ice Shelf Discovered in December 1929 by the Byrd Antarctic Expedition geological party under Laurence Gould, and named by R. Admiral Byrd for D. Harold Byrd, a cousin and a contributor towards the purchase of furs for the expedition.
This article incorporates public domain material from the United States Geological Survey document "Harold Byrd Mountains" (content from the Geographic Names Information System).