| Location Map: | Scotland Argyll and Bute |
| Caption: | A' Chùli shown within Argyll and Bute |
| Coordinates: | 56.234°N -5.787°W |
| Gridreference: | NM653111 |
| Celtic Name: | A' Chùli |
| Meaning Of Name: | The retreat |
| Highest Elevation: | 45 m |
| Population: | 0 |
| Local Authority: | Argyll and Bute |
A' Chùli is an uninhabited island in the Garvellachs in the Firth of Lorn, in the council area of Argyll and Bute, Scotland.[1] It is 200NaN0 in extent[2] and lies between Garbh Eileach and Eileach an Naoimh, the two largest islands of the archipelago. Grob nan Sgarbh, Sgeir Leth a' Chuain and Sgeir nam Marag are small skerries offshore to the southwest.An earlier name of the island was Gaelic; Scottish Gaelic: Cùil Bhrianainn meaning "Brendan's retreat" and Brendan the Navigator is reputed to have built a chapel and been buried there. However, no trace of the chapel is visible and a similar fate appears to have befallen two unroofed buildings, thought to be shielings, recorded in 1881 by the Ordnance Survey.
On 7 March 1981 a fishing boat foundered approximately northwest of the island.