The three Beaumont children disappeared from a beach in Glenelg, South Australia, resulting in one of the country's largest-ever police investigations.

Janee Nartare Beaumont, Arnna Kathleen Beaumont and Grant Ellis Beaumont, collectively referred to as the Beaumont children, were three Australian siblings who disappeared from Glenelg Beach near Adelaide, South Australia, on 26 January 1966 in a suspected abduction and murder.

Glenelg is a beach-side suburb of the South Australian capital of Adelaide. Located on the shore of Holdfast Bay in Gulf St Vincent, it has become a tourist destination due to its beach and many attractions, home to several hotels and dozens of restaurants.