Flag of Saint Helena, Ascension and Tristan da Cunha

Saint Helena, Ascension and Tristan da Cunha, a British Overseas Territory, does not have its own flag, however, the three administrative divisions do have their own flags:

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  Flag of Saint Helena
  Flag ratio: 1:2

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  Flag of Ascension Island

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  Flag of Tristan da Cunha

Before 2009, Ascension Island and Tristan da Cunha were dependencies of Saint Helena, and the flag of Saint Helena was used on all three islands.

Flags of the British Overseas Territories and the Crown dependencies
British Overseas Territories	Akrotiri and Dhekelia Anguilla Bermuda British Antarctic Territory British Indian Ocean Territory British Virgin Islands Cayman Islands Falkland Islands Gibraltar Montserrat Pitcairn Islands Saint Helena, Ascension and Tristan da Cunha Saint Helena Ascension Tristan da Cunha South Georgia and the South Sandwich Islands Turks and Caicos Islands
Crown dependencies	Guernsey Alderney Herm Sark Jersey Isle of Man

National and regional flags incorporating the Union Jack
Sovereign states	Australia Fiji New Zealand Tuvalu United Kingdom
Dependent territories	United Kingdom Anguilla Ascension Island Bermuda British Antarctic Territory British Indian Ocean Territory British Virgin Islands Cayman Islands Falkland Islands Montserrat Pitcairn Islands Saint Helena South Georgia and the South Sandwich Islands Tristan da Cunha Turks and Caicos Islands New Zealand Cook Islands Niue
States, provinces and other administrative divisions	Australia New South Wales Queensland South Australia Tasmania Victoria Western Australia Lord Howe Island Canada British Columbia Manitoba Ontario United States Hawaii
Cities	Chile Coquimbo United States Baton Rouge, Louisiana Taunton, Massachusetts
Miscellaneous	Flags based on British ensigns Mosquito Kingdom (1844–1860) List of British flags Flags inspired by the Union Jack Basque Country St. Pierre & Miquelon Newfoundland & Labrador