The Astor Trophy is a women's team golf tournament between teams of amateurs golfers from Great Britain and Ireland, Australia, Canada, New Zealand and South Africa. It has been played every four years since 1959. From its foundation until 2007 it was called the Commonwealth Trophy. South Africa did not compete from 1963 to 1991. While it was called the Commonwealth Trophy, Irish golfers were not eligible. The trophy was presented by Nancy Astor, Viscountess Astor.