Mount Selby () is a mountain rising over 2,200 m between Mount Henderson and Mount Olympus in Britannia Range. Named by the New Zealand Antarctic Place-Names Committee (NZ-APC) for Michael Selby, Professor of Earth Sciences, University of Waikato, Hamilton, New Zealand. Selby was a member of field parties in Antarctica, 1969-70, 1971-72, and 1978-79, the last doing geological work in Britannia Range.