Lake Bonney SE (alternative name: Coonunda or Canunda) is a coastal freshwater lake located in the Limestone Coast region of South Australia in the gazetted locality of Canunda.

[1] It has a surface area of 79 square kilometres (31 sq mi).

The Canunda National Park lies adjacent to the lake shore.

[2] The name was proposed in 1916 to be changed by the Nomenclature Committee to "Coonunda Lake" but was not actioned without any reason provided.

[2] In both 1972 and 1981, the District Council of Barmera wrote to the South Australian Government requesting that the lake be renamed with its native name, i.e. "Canunda" or "Coonunda", in order to avoid being confused with the lake in the Riverland of South Australia.