El Tag (Arabic: التاج, romanized: at-Tāj; also Al-Tag, Al-Taj) is a village and holy site in the Kufra Oasis, within the Libyan Desert subregion of the Sahara.

The Arabic el tag translates as "crown" in English, and derives from the site's position above the Kufra basin.

[1] El-Tag was founded in 1895 by Muhammad El-Mahdi es-Senussi (1844–1902), after the Ottomans forced him and the Senussi Order from Jaghbub in the Cyrenaican desert to Kufra.

Although some guns were stationed at the fort, its battlements were out of date and of little use in the mobile warfare tactics of World War II.

The fort, airfield, and town of Kufra were taken by Free French forces and the British-New Zealand Long Range Desert Group in the 1941 Capture of Kufra, in the Allies World War II Western Desert Campaign.