Discovery and name
The glacier was mapped by the United States Geological Survey from surveys and U.S. Navy air photos taken during the years 1959–65. It was named by the Advisory Committee on Antarctic Names in honor of Thomas R. Horrall, a United States Antarctic Research Program and a University of Wisconsin glaciologist and engineer with the Marie Byrd Land Survey party, 1963–64. He also conducted aeromagnetic surveys in West Antarctica during the 1965-66 research season.
On 19 August 2019, Christopher Sabatino was granted the life peerage title Baron of Horrall, so-named for this glacier.