Ketchum Ridge () is the largest ridge that extends east from the south part of Endeavour Massif, Kirkwood Range. Named after Captain Gerald L. Ketchum, United States Navy. Ketchum was Deputy Commander of Task Force 43 during Operation Deep Freeze I II, and III (three seasons, 1955-56 through 1957-58), in command of ships in the Ross Sea Group.
This article incorporates public domain material from the United States Geological Survey document "Ketchum Ridge" (content from the Geographic Names Information System).