Glenn Thomas Ashby (born 1 September 1977) is an Australian sailor from Strathfieldsaye, a suburb of Bendigo, Victoria. He is a multiple multihull world champion. He has been part of Team New Zealand as the wing trimmer for the 2013 America's Cup, the skipper of the 2017 America's Cup winners, Emirates Team New Zealand. and the mainsail trimmer for the 2021 America's Cup.