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:
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:
| Flag | Date | Use | Description |
|---|---|---|---|
 | 2019–present | Flag of Saint Helena [1] | A British Blue Ensign with the Union Flag in the canton and the coat of arms in the fly |
| Flag | Date | Use | Description |
|---|---|---|---|
 | 2013–present | Flag of Ascension Island [2] | A British Blue Ensign with the Union Flag in the canton and the coat of arms in the fly |
| Flag | Date | Use | Description |
|---|---|---|---|
 | 2002–present | Flag of Tristan da Cunha [3] | A British Blue Ensign with the Union Flag in the canton and the coat of arms in the fly |
| Flag | Date | Use | Description |
|---|---|---|---|
 | 2019–present | Flag of the Governor [4] | A Union Flag defaced with the Island's coat of arms |
| Flag | Date | Use | Description |
|---|---|---|---|
 | 2002–present | Flag of the Administrator [5] | A Union Flag defaced with the Island's coat of arms |
| Flag | Date | Use | Description |
|---|---|---|---|
 | 1874–1985 | Flag of Saint Helena | A British Blue Ensign with the Union Flag in the canton and the colonial seal in the fly |
 | 1874–1985 | Flag of the Governor of Saint Helena [6] | A Union Flag defaced with the colonial seal |
| 1985–2019 | Flag of Saint Helena [7] | A British Blue Ensign with the Union Flag in the canton and the coat of arms in the fly | |
 | 1985–1999 | Flag of the Governor of Saint Helena [8] | A Union Flag defaced with the Island's coat of arms |
| Flag | Date | Use | Description |
|---|---|---|---|
 | –2013 | De facto flag of Ascension Island [9] | The Union Flag |
